Compare 20981 vs 21221
| Property | 20981 | 21221 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 209811 | 212211 |
| Prime factorization | 20981 | 21221 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20981 | 1, 21221 |
| Number of properties | 5 | 6 |
| Chen primes | 1161st | 1172nd |
| Good primes | 265th | |
| Isolated primes | 1665th | |
| Primes | 2359th | 2386th |
| Pythagorean primes | 1172nd | 1184th |
| Sexy primes (1st member) | 723rd | |
| Sophie germain primes | 346th | |
| Twin primes (1st member) | 357th | |
| Roman numberals | ||
| Base 2 | 1010001111101012 | 1010010111001012 |
| Base 3 | 10012100023 | 10020022223 |
| Base 4 | 110133114 | 110232114 |
| Base 5 | 11324115 | 11343415 |
| Base 6 | 2410456 | 2421256 |
| Base 7 | 1151127 | 1156047 |
| Base 8 | 507658 | 513458 |
| Base 9 | 317029 | 320889 |
| Base 10 | 2098110 | 2122110 |
| Base 11 | 1484411 | 14a4211 |
| Base 12 | 1018512 | 1034512 |
| Base 13 | 971c13 | 987513 |
| Base 14 | 790914 | 7a3b14 |
| Base 15 | 633b15 | 644b15 |
| Base 16 | 51f516 | 52e516 |