Compare 211 vs 221
| Property | 211 | 221 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 2111 | 131 × 171 |
| Prime factorization | 211 | 13 × 17 |
| Divisors count | 2 | 4 |
| Divisors | 1, 211 | 1, 13, 17, 221 |
| Number of properties | 8 | 1 |
| Centered decagonal primes | 6th | |
| Chen primes | 37th | |
| Euclid primes | 5th | |
| Isolated primes | 18th | |
| Lucky primes | 14th | |
| Multiplicative primes | 12th | |
| Primes | 47th | |
| Semiprimes | 75th | |
| Super primes | 15th | |
| Roman numberals | CCXI | CCXXI |
| Base 2 | 110100112 | 110111012 |
| Base 3 | 212113 | 220123 |
| Base 4 | 31034 | 31314 |
| Base 5 | 13215 | 13415 |
| Base 6 | 5516 | 10056 |
| Base 7 | 4217 | 4347 |
| Base 8 | 3238 | 3358 |
| Base 9 | 2549 | 2659 |
| Base 10 | 21110 | 22110 |
| Base 11 | 18211 | 19111 |
| Base 12 | 15712 | 16512 |
| Base 13 | 13313 | 14013 |
| Base 14 | 11114 | 11b14 |
| Base 15 | e115 | eb15 |
| Base 16 | d316 | dd16 |