| Nominal | 21128 |
| Cardinal | twenty-one thousand one hundred twenty-eight |
Cardinal twenty-one thousand one hundred twenty-eight | |
| Ordinal | 21,128th |
| Number of digits | 5 |
| Sum of digits | 14 |
| Product of digits | 32 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 2 x 19 x 139 |
| Prime factorization in exponent form | 23 x 19 x 139 |
| Prime factors | 2, 19, 139 |
| Number of distinct prime factors ω(n) | 3 |
| Total number of prime factors Ω(n) | 5 |
| Sum of prime factors | 160 |
| Product of prime factors | 5282 |
| Is 21128 a prime number? | No |
| Is 21128 a semiprime number? | No |
| Is 21128 a Chen prime number? | No |
| Is 21128 a Mersenne prime number? | No |
| Is 21128 a Catalan number? | No |
| Is 21128 a Fibonacci number? | No |
| Is 21128 a Idoneal number? | No |
| Square of 21128 (n2) | 446392384 |
| Cube of 21128 (n3) | 9431378289152 |
| Square root of 21128 | 145.35473848485 |
| Natural Logarithm (ln) of 21128 | 9.958354453977 |
| Decimal Logarithm (log) of 21128 | 4.3248583881989 |
| Sine of 21128 | -0.70993408311611 |
| Cosecant of 21128 | -1.4085814778898 |
| Cosine of 21128 | -0.70426812907449 |
| Secant of 21128 | -1.4199137497733 |
| Tangent of 21128 | 1.0080451660493 |
| Cotangent of 21128 | 0.9920190420824 |
| The spelling of 21128 in words is "twenty-one thousand one hundred twenty-eight", meaning that: |
| 21128 is not an aban number (as it contains the letter a) |
| 21128 is not an eban number (as it contains the letter e) |
| 21128 is not an iban number (as it contains the letter i) |
| 21128 is not an oban number (as it contains the letter o) |
| 21128 is not a tban number (as it contains the letter t) |
| 21128 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১১২৮ |
| Eastern Arabic numerals | ٢١٬١٢٨ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍢𓎇𓐁 |
| Khmer numerals | ២១១២៨ |
| Japanese numerals | 二万千百二十八 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๑๒๘ |
| Arabic | واحد و عشرون ألف و مائة و ثمانية و عشرون |
| Croatian | dvadeset i jedna tisuća sto dvadeset i osam |
| Czech | dvacet jedna tisíc sto dvacet osm |
| Danish | en og tyve tusinde et hundrede otte og tyve |
| Dutch | éénentwintigduizend honderdachtentwintig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ɖeka blaeve vɔ enyi |
| Faroese | tjúgoeitt tusin og eitthundraðogtjúgoátta |
| Filipino | dalawáng pû’t isáng libó’t isáng daán at dalawáng pû’t waló |
| Finnish | kaksikymmentäyksituhattasatakaksikymmentäkahdeksan |
| French | vingt et un mille cent vingt-huit |
| Greek | είκοσι μία χίλιάδες εκατόν είκοσι οκτώ |
| German | einundzwanzigtausendeinhundertachtundzwanzig |
| Hebrew | עשרים ואחד אלף מאה עשרים ושמונה |
| Hindi | इक्कीस हज़ार एक सौ अट्ठाईस |
| Hungarian | huszonegyezerszázhuszonnyolc |
| Icelandic | tuttugu og eitt þúsund og eitthundrað og tuttugu og átta |
| Indonesian | dua puluh satu ribu seratus dua puluh delapan |
| Italian | ventunomilacentoventotto |
| Japanese | 二万千百二十八 |
| Korean | 이만 천백이십팔 |
| Latvian | divdesmit viens tūkstoši simt divdesmit astoņi |
| Lithuanian | dvidešimt vienas tūkstantis šimtas dvidešimt aštuoni |
| Norwegian | tjueett tusen hundre og tjueåtte |
| Persian | بیست و یک هزار و صد و بیست و هشت |
| Polish | dwadzieścia jeden tysięcy sto dwadzieścia osiem |
| Portuguese | vinte e um mil cento e vinte e oito |
| Romanian | douăzeci şi una mii una sută douăzeci şi opt |
| Russian | двадцать одна тысяча сто двадцать восемь |
| Serbian | двадесет и једна хиљада сто двадесет и осам |
| Slovak | dvadsaťjedna tisíc jednasto dvadsaťosem |
| Slovene | dvaset ena tisuću sto dvaset osem |
| Spanish | veintiún mil ciento veintiocho |
| Swahili | elfu ishirini na moja, mia moja na ishirini na nane |
| Swedish | tjugoentusenenhundratjugoåtta |
| Thai | สองหมื่นหนึ่งพันหนึ่งร้อยยี่สิบแปด |
| Turkish | yirmi bir bin yüz yirmi sekiz |
| Ukrainian | двадцять одна тисяча сто двадцять вісім |
| Vietnamese | hai mươi mốt nghìn một trăm hai mươi tám |
| Number 21128 reversed | 82112 | |
| Unicode Character | U+5288 | 劈 |
| Unix Timestamp | Thu, 01 Jan 1970 05:52:08 +0000 | |