Compare 21121 vs 21397
| Property | 21121 | 21397 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 211211 | 213971 |
| Prime factorization | 21121 | 21397 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21121 | 1, 21397 |
| Number of properties | 4 | 5 |
| Additive primes | 1102nd | |
| Cousin primes (1st member) | 365th | |
| Isolated primes | 1655th | 1677th |
| Primes | 2374th | 2402nd |
| Pythagorean primes | 1179th | 1191st |
| Sexy primes (2nd member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010010100000012 | 1010011100101012 |
| Base 3 | 10012220213 | 10021001113 |
| Base 4 | 110220014 | 110321114 |
| Base 5 | 11334415 | 11410425 |
| Base 6 | 2414416 | 2430216 |
| Base 7 | 1154027 | 1162457 |
| Base 8 | 512018 | 516258 |
| Base 9 | 318679 | 323149 |
| Base 10 | 2112110 | 2139710 |
| Base 11 | 1496111 | 1509211 |
| Base 12 | 1028112 | 1047112 |
| Base 13 | 97c913 | 997c13 |
| Base 14 | 79a914 | 7b2514 |
| Base 15 | 63d115 | 651715 |
| Base 16 | 528116 | 539516 |