| Nominal | 28121 |
| Cardinal | twenty-eight thousand one hundred twenty-one |
Cardinal twenty-eight thousand one hundred twenty-one | |
| Ordinal | 28,121st |
| Number of digits | 5 |
| Sum of digits | 14 |
| Product of digits | 32 |
| Number parity | Odd |
| Prime factorization | 61 x 461 |
| Prime factors | 61, 461 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 522 |
| Product of prime factors | 28121 |
| Is 28121 a prime number? | No |
| Is 28121 a semiprime number? | Yes |
| Is 28121 a Chen prime number? | No |
| Is 28121 a Mersenne prime number? | No |
| Is 28121 a Catalan number? | No |
| Is 28121 a Fibonacci number? | No |
| Is 28121 a Idoneal number? | No |
| Square of 28121 (n2) | 790790641 |
| Cube of 28121 (n3) | 22237823615561 |
| Square root of 28121 | 167.69317219255 |
| Natural Logarithm (ln) of 28121 | 10.24427190717 |
| Decimal Logarithm (log) of 28121 | 4.4490307604004 |
| Sine of 28121 | -0.56806909568112 |
| Cosecant of 28121 | -1.7603492385042 |
| Cosine of 28121 | -0.82298086401328 |
| Secant of 28121 | -1.2150950814621 |
| Tangent of 28121 | 0.69025796409278 |
| Cotangent of 28121 | 1.4487337372693 |
| The spelling of 28121 in words is "twenty-eight thousand one hundred twenty-one", meaning that: |
| 28121 is not an aban number (as it contains the letter a) |
| 28121 is not an eban number (as it contains the letter e) |
| 28121 is not an iban number (as it contains the letter i) |
| 28121 is not an oban number (as it contains the letter o) |
| 28121 is not a tban number (as it contains the letter t) |
| 28121 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২৮১২১ |
| Eastern Arabic numerals | ٢٨٬١٢١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎇𓏺 |
| Khmer numerals | ២៨១២១ |
| Japanese numerals | 二万八千百二十一 |
| Roman numerals | n/a |
| Thai numerals | ๒๘๑๒๑ |
| Arabic | ثمانية و عشرون ألف و مائة و واحد و عشرون |
| Croatian | dvadeset i osam tisuća sto dvadeset i jedan |
| Czech | dvacet osm tisíc sto dvacet jeden |
| Danish | otte og tyve tusinde et hundrede en og tyve |
| Dutch | achtentwintigduizend honderdéénentwintig |
| Estonian | akpe blaeve vɔ enyi alafa ɖeka blaeve vɔ ɖekɛ |
| Faroese | tjúgoátta tusin og eitthundraðogtjúgoein |
| Filipino | dalawáng pû’t walóng libó’t isáng daán at dalawáng pû’t isá |
| Finnish | kaksikymmentäkahdeksantuhattasatakaksikymmentäyksi |
| French | vingt-huit mille cent vingt et un |
| Greek | είκοσι οκτώ χίλιάδες εκατόν είκοσι ένα |
| German | achtundzwanzigtausendeinhunderteinundzwanzig |
| Hebrew | עשרים ושמונה אלף מאה עשרים ואחת |
| Hindi | अट्ठाईस हज़ार एक सौ इक्कीस |
| Hungarian | huszonnyolcezerszázhuszonegy |
| Icelandic | tuttugu og átta þúsund og eitthundrað og tuttugu og einn |
| Indonesian | dua puluh delapan ribu seratus dua puluh satu |
| Italian | ventottomilacentoventuno |
| Japanese | 二万八千百二十一 |
| Korean | 이만 팔천백이십일 |
| Latvian | divdesmit astoņi tūkstoši simt divdesmit viens |
| Lithuanian | dvidešimt aštuoni tūkstančiai šimtas dvidešimt vienas |
| Norwegian | tjueåtte tusen hundre og tjueén |
| Persian | بیست و هشت هزار و صد و بیست و یک |
| Polish | dwadzieścia osiem tysięcy sto dwadzieścia jeden |
| Portuguese | vinte e oito mil cento e vinte e um |
| Romanian | douăzeci şi opt mii una sută douăzeci şi unu |
| Russian | двадцать восемь тысяч сто двадцать один |
| Serbian | двадесет и осам хиљада сто двадесет и један |
| Slovak | dvadsaťosem tisíc jednasto dvadsaťjeden |
| Slovene | dvaset osem tisuću sto dvaset ena |
| Spanish | veintiocho mil ciento veintiuno |
| Swahili | elfu ishirini na nane, mia moja na ishirini na moja |
| Swedish | tjugoåttatusenenhundratjugoen |
| Thai | สองหมื่นแปดพันหนึ่งร้อยยี่สิบเอ็ด |
| Turkish | yirmi sekiz bin yüz yirmi bir |
| Ukrainian | двадцять вісім тисяч сто двадцять один |
| Vietnamese | hai mươi tám nghìn một trăm hai mươi mốt |
| Number 28121 reversed | 12182 | |
| Unicode Character | U+6DD9 | 淙 |
| Unix Timestamp | Thu, 01 Jan 1970 07:48:41 +0000 | |