12111990907 has 2 divisors, whose sum is σ = 12111990908. Its totient is φ = 12111990906.

The previous prime is 12111990881. The next prime is 12111990949. The reversal of 12111990907 is 70909911121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111990907 - 2²⁷ = 11977773179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111990907.

It is not a weakly prime, because it can be changed into another prime (12111990977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055995453 + 6055995454.

It is an arithmetic number, because the mean of its divisors is an integer number (6055995454).

Almost surely, 2^12111990907 is an apocalyptic number.

12111990907 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111990907 is an equidigital number, since it uses as much as digits as its factorization.

12111990907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 40.

The spelling of 12111990907 in words is "twelve billion, one hundred eleven million, nine hundred ninety thousand, nine hundred seven".