12156211 has 2 divisors, whose sum is σ = 12156212. Its totient is φ = 12156210.

The previous prime is 12156203. The next prime is 12156217. The reversal of 12156211 is 11265121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12156211 - 2³ = 12156203 is a prime.

It is not a weakly prime, because it can be changed into another prime (12156217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078105 + 6078106.

It is an arithmetic number, because the mean of its divisors is an integer number (6078106).

Almost surely, 2^12156211 is an apocalyptic number.

12156211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156211 is an equidigital number, since it uses as much as digits as its factorization.

12156211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 12156211 is about 3486.5758273699. The cubic root of 12156211 is about 229.9319962785.

The spelling of 12156211 in words is "twelve million, one hundred fifty-six thousand, two hundred eleven".