| Nominal | 21221 |
| Cardinal | twenty-one thousand two hundred twenty-one |
Cardinal twenty-one thousand two hundred twenty-one | |
| Ordinal | 21,221st |
| Number of digits | 5 |
| Sum of digits | 8 |
| Product of digits | 8 |
| Number parity | Odd |
| Prime factorization | 21221 |
| Prime factors | 21221 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 21221 |
| Product of prime factors | 21221 |
| Is 21221 a prime number? | Yes |
| Is 21221 a semiprime number? | No |
| Is 21221 a Chen prime number? | Yes |
| Is 21221 a Mersenne prime number? | No |
| Is 21221 a Catalan number? | No |
| Is 21221 a Fibonacci number? | No |
| Is 21221 a Idoneal number? | No |
| Square of 21221 (n2) | 450330841 |
| Cube of 21221 (n3) | 9556470776861 |
| Square root of 21221 | 145.67429423203 |
| Natural Logarithm (ln) of 21221 | 9.962746536411 |
| Decimal Logarithm (log) of 21221 | 4.3267658453641 |
| Sine of 21221 | 0.44249143529881 |
| Cosecant of 21221 | 2.25993074719 |
| Cosine of 21221 | -0.89677273023169 |
| Secant of 21221 | -1.1151097332561 |
| Tangent of 21221 | -0.49342650638417 |
| Cotangent of 21221 | -2.0266442662921 |
| The spelling of 21221 in words is "twenty-one thousand two hundred twenty-one", meaning that: |
| 21221 is not an aban number (as it contains the letter a) |
| 21221 is not an eban number (as it contains the letter e) |
| 21221 is an iban number (a number without the letter i) |
| 21221 is not an oban number (as it contains the letter o) |
| 21221 is not a tban number (as it contains the letter t) |
| 21221 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১২২১ |
| Eastern Arabic numerals | ٢١٬٢٢١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍣𓎇𓏺 |
| Khmer numerals | ២១២២១ |
| Japanese numerals | 二万千二百二十一 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๒๒๑ |
| Arabic | واحد و عشرون ألف و مائتان و واحد و عشرون |
| Croatian | dvadeset i jedna tisuća dvjesto dvadeset i jedan |
| Czech | dvacet jedna tisíc dvě stě dvacet jeden |
| Danish | en og tyve tusinde to hundrede en og tyve |
| Dutch | éénentwintigduizend tweehonderdéénentwintig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa eve blaeve vɔ ɖekɛ |
| Faroese | tjúgoeitt tusin og tveyhundraðogtjúgoein |
| Filipino | dalawáng pû’t isáng libó’t dalawáng daán at dalawáng pû’t isá |
| Finnish | kaksikymmentäyksituhattakaksisataakaksikymmentäyksi |
| French | vingt et un mille deux cent vingt et un |
| Greek | είκοσι μία χίλιάδες διακόσια είκοσι ένα |
| German | einundzwanzigtausendzweihunderteinundzwanzig |
| Hebrew | עשרים ואחד אלף מאתיים עשרים ואחת |
| Hindi | इक्कीस हज़ार दो सौ इक्कीस |
| Hungarian | huszonegyezerkétszázhuszonegy |
| Icelandic | tuttugu og eitt þúsund og tvöhundrað og tuttugu og einn |
| Indonesian | dua puluh satu ribu dua ratus dua puluh satu |
| Italian | ventunomiladuecentoventuno |
| Japanese | 二万千二百二十一 |
| Korean | 이만 천이백이십일 |
| Latvian | divdesmit viens tūkstoši divsimt divdesmit viens |
| Lithuanian | dvidešimt vienas tūkstantis du šimtai dvidešimt vienas |
| Norwegian | tjueett tusen to hundre og tjueén |
| Persian | بیست و یک هزار و دویست و بیست و یک |
| Polish | dwadzieścia jeden tysięcy dwieście dwadzieścia jeden |
| Portuguese | vinte e um mil duzentos e vinte e um |
| Romanian | douăzeci şi una mii două sute douăzeci şi unu |
| Russian | двадцать одна тысяча двести двадцать один |
| Serbian | двадесет и једна хиљада двеста двадесет и један |
| Slovak | dvadsaťjedna tisíc dvesto dvadsaťjeden |
| Slovene | dvaset ena tisuću dvjesto dvaset ena |
| Spanish | veintiún mil doscientos veintiuno |
| Swahili | elfu ishirini na moja, mia mbili na ishirini na moja |
| Swedish | tjugoentusentvåhundratjugoen |
| Thai | สองหมื่นหนึ่งพันสองร้อยยี่สิบเอ็ด |
| Turkish | yirmi bir bin iki yüz yirmi bir |
| Ukrainian | двадцять одна тисяча двісті двадцять один |
| Vietnamese | hai mươi mốt nghìn hai trăm hai mươi mốt |
| Number 21221 reversed | 12212 | |
| Unicode Character | U+52E5 | 勥 |
| Unix Timestamp | Thu, 01 Jan 1970 05:53:41 +0000 | |