12211331831 has 2 divisors, whose sum is σ = 12211331832. Its totient is φ = 12211331830.

The previous prime is 12211331807. The next prime is 12211331903. The reversal of 12211331831 is 13813311221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211331831 - 2⁶ = 12211331767 is a prime.

It is a super-2 number, since 2×12211331831² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211331831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211333831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105665915 + 6105665916.

It is an arithmetic number, because the mean of its divisors is an integer number (6105665916).

Almost surely, 2^12211331831 is an apocalyptic number.

12211331831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211331831 is an equidigital number, since it uses as much as digits as its factorization.

12211331831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The spelling of 12211331831 in words is "twelve billion, two hundred eleven million, three hundred thirty-one thousand, eight hundred thirty-one".