Compare 21209 vs 21211
| Property | 21209 | 21211 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 1271 × 1671 | 212111 |
| Prime factorization | 127 × 167 | 21211 |
| Divisors count | 4 | 2 |
| Divisors | 1, 127, 167, 21209 | 1, 21211 |
| Number of properties | 1 | 5 |
| Additive primes | 1108th | |
| Isolated primes | 1664th | |
| Long primes | 906th | |
| Lucky primes | 388th | |
| Primes | 2385th | |
| Semiprimes | 5374th | |
| Roman numberals | ||
| Base 2 | 1010010110110012 | 1010010110110112 |
| Base 3 | 10020021123 | 10020021213 |
| Base 4 | 110231214 | 110231234 |
| Base 5 | 11343145 | 11343215 |
| Base 6 | 2421056 | 2421116 |
| Base 7 | 1155567 | 1155617 |
| Base 8 | 513318 | 513338 |
| Base 9 | 320759 | 320779 |
| Base 10 | 2120910 | 2121110 |
| Base 11 | 14a3111 | 14a3311 |
| Base 12 | 1033512 | 1033712 |
| Base 13 | 986613 | 986813 |
| Base 14 | 7a2d14 | 7a3114 |
| Base 15 | 643e15 | 644115 |
| Base 16 | 52d916 | 52db16 |