13921211 has 2 divisors, whose sum is σ = 13921212. Its totient is φ = 13921210.

The previous prime is 13921163. The next prime is 13921217. The reversal of 13921211 is 11212931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13921211 - 2¹⁰ = 13920187 is a prime.

It is not a weakly prime, because it can be changed into another prime (13921217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960605 + 6960606.

It is an arithmetic number, because the mean of its divisors is an integer number (6960606).

Almost surely, 2^13921211 is an apocalyptic number.

13921211 is a deficient number, since it is larger than the sum of its proper divisors (1).

13921211 is an equidigital number, since it uses as much as digits as its factorization.

13921211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

The square root of 13921211 is about 3731.1139087409. The cubic root of 13921211 is about 240.5612501272.

The spelling of 13921211 in words is "thirteen million, nine hundred twenty-one thousand, two hundred eleven".