21001
Number 21001 is an odd five-digits prime number and natural number following 21000 and preceding 21002.
| Nominal | 21001 |
| Cardinal | twenty-one thousand one |
Cardinal twenty-one thousand one |
| Ordinal | 21,001st |
| Number of digits | 5 |
| Sum of digits | 4 |
| Product of digits | 0 |
| Number parity | Odd |
Calculation was done in 0.0000350475 seconds
| Prime factorization | 21001 |
| Prime factors | 21001 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 21001 |
| Product of prime factors | 21001 |
Calculation was done in 0.0008900166 seconds
| List of proper divisors | 1 |
| List of all dividers | 1, 21001 |
| Number of divisors d(n) | 2 |
| Sum of all divisors σ(n) | 21002 |
| Aliquot sum | 1 |
| 21001 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 21000. |
Calculation was done in 0.0000178814 seconds
| Is 21001 a prime number? | Yes |
| Is 21001 a semiprime number? | No |
| Is 21001 a Chen prime number? | Yes |
| Is 21001 a Mersenne prime number? | No |
Calculation was done in 0.0865399837 seconds
| Is 21001 a Catalan number? | No |
| Is 21001 a Fibonacci number? | No |
| Is 21001 a Idoneal number? | No |
Calculation was done in 0.0000059605 seconds
| 21001 is not a Happy number |
| 21001 is not a Humble number |
| 21001 is not a Münchhausen number |
| 21001 is not a Perfect number |
| 21001 is not a Perfect square |
| 21001 is not a Palindrome |
Calculation was done in 0.0089721680 seconds
| Base | System | Value |
|---|
| 2 | Binary | 1010010000010012 |
| 3 | Ternary | 10012102113 |
| 4 | Quaternary | 110200214 |
| 5 | Quinary | 11330015 |
| 6 | Senary | 2411216 |
| 7 | Septenary | 1151417 |
| 8 | Octal | 510118 |
| 9 | Nonary | 317249 |
| 10 | Decimal | 21001 |
| 12 | Duodecimal | 101a112 |
| 16 | Hexadecimal | 520916 |
| 20 | Vigesimal | 2ca120 |
| 36 | Base36 | g7d36 |
| 60 | Sexagesimal | 5o160 |
Calculation was done in 0.0000190735 seconds
| Square of 21001 (n2) | 441042001 |
| Cube of 21001 (n3) | 9262323063001 |
| Square root of 21001 | 144.91721774862 |
| Natural Logarithm (ln) of 21001 | 9.9523253346194 |
| Decimal Logarithm (log) of 21001 | 4.3222399749312 |
Calculation was done in 0.0000040531 seconds
| Sine of 21001 | 0.5200327116853 |
| Cosecant of 21001 | 1.9229559555191 |
| Cosine of 21001 | -0.85414634505876 |
| Secant of 21001 | -1.1707595610343 |
| Tangent of 21001 | -0.60883326925613 |
| Cotangent of 21001 | -1.6424858011156 |
Calculation was done in 0.0000109673 seconds
Is 21001 an Even Number?
No
Is 21001 an Odd Number?
Yes, the number 21001 is an odd number.
Total number of all odd numbers from 1 to 21001 is
10501Sum of all the odd numbers from 1 to 21001 are 110271001
The sum of all odd numbers is a perfect square: 110271001 = 10501
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.Previous odd number is
20999
Calculation was done in 0.0000059605 seconds
| The spelling of 21001 in words is "twenty-one thousand one", meaning that: |
| 21001 is not an aban number (as it contains the letter a) |
| 21001 is not an eban number (as it contains the letter e) |
| 21001 is an iban number (a number without the letter i) |
| 21001 is not an oban number (as it contains the letter o) |
| 21001 is not a tban number (as it contains the letter t) |
| 21001 is not an uban number (as it contains the letter u) |
Calculation was done in 0.0000030994 seconds
| Bengali numerals | ২১০০১ |
| Eastern Arabic numerals | ٢١٬٠٠١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓏺 |
| Khmer numerals | ២១០០១ |
| Japanese numerals | 二万千一 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๐๐๑ |
Calculation was done in 0.0000698566 seconds
| Arabic | واحد و عشرون ألف و واحد |
| Croatian | dvadeset i jedna tisuća jedan |
| Czech | dvacet jedna tisíc jeden |
| Danish | en og tyve tusinde og en |
| Dutch | éénentwintigduizend en één |
| Estonian | akpe blaeve vɔ ɖekɛ kple ɖeka |
| Faroese | tjúgoeitt tusin og ein |
| Filipino | dalawáng pû’t isáng libó’t isá |
| Finnish | kaksikymmentäyksituhattayksi |
| French | vingt et un mille un |
| Greek | είκοσι μία χίλιάδες ένα |
| German | einundzwanzigtausendeins |
| Hebrew | עשרים ואחד אלף ואחת |
| Hindi | इक्कीस हज़ार एक |
| Hungarian | huszonegyezeregy |
| Icelandic | tuttugu og eitt þúsund og einn |
| Indonesian | dua puluh satu ribu satu |
| Italian | ventunomilauno |
| Japanese | 二万千一 |
| Korean | 이만 천일 |
| Latvian | divdesmit viens tūkstoši viens |
| Lithuanian | dvidešimt vienas tūkstantis vienas |
| Norwegian | tjueett tusen og én |
| Persian | بیست و یک هزار و یک |
| Polish | dwadzieścia jeden tysięcy jeden |
| Portuguese | vinte e um mil e um |
| Romanian | douăzeci şi una mii unu |
| Russian | двадцать одна тысяча один |
| Serbian | двадесет и једна хиљада један |
| Slovak | dvadsaťjedna tisíc jeden |
| Slovene | dvaset ena tisuću ena |
| Spanish | veintiún mil uno |
| Swahili | elfu ishirini na moja, moja |
| Swedish | tjugoentusenen |
| Thai | สองหมื่นหนึ่งพันหนึ่ง |
| Turkish | yirmi bir bin bir |
| Ukrainian | двадцять одна тисяча один |
| Vietnamese | hai mươi mốt nghìn không trăm lẻ một |
Calculation was done in 0.0140089989 seconds
| Number 21001 reversed | 10012 |
| Unicode Character | U+5209 | 刉 |
| Unix Timestamp | Thu, 01 Jan 1970 05:50:01 +0000 |
Calculation was done in 0.0000219345 seconds
This page was generated in 0.11 seconds.