Compare 21221 vs 21391
| Property | 21221 | 21391 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 212211 | 213911 |
| Prime factorization | 21221 | 21391 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21221 | 1, 21391 |
| Number of properties | 6 | 3 |
| Chen primes | 1172nd | |
| Isolated primes | 1665th | 1676th |
| Primes | 2386th | 2401st |
| Pythagorean primes | 1184th | |
| Sexy primes (1st member) | 723rd | 729th |
| Sophie germain primes | 346th | |
| Roman numberals | ||
| Base 2 | 1010010111001012 | 1010011100011112 |
| Base 3 | 10020022223 | 10021000213 |
| Base 4 | 110232114 | 110320334 |
| Base 5 | 11343415 | 11410315 |
| Base 6 | 2421256 | 2430116 |
| Base 7 | 1156047 | 1162367 |
| Base 8 | 513458 | 516178 |
| Base 9 | 320889 | 323079 |
| Base 10 | 2122110 | 2139110 |
| Base 11 | 14a4211 | 1508711 |
| Base 12 | 1034512 | 1046712 |
| Base 13 | 987513 | 997613 |
| Base 14 | 7a3b14 | 7b1d14 |
| Base 15 | 644b15 | 651115 |
| Base 16 | 52e516 | 538f16 |