12156793291 has 2 divisors, whose sum is σ = 12156793292. Its totient is φ = 12156793290.

The previous prime is 12156793277. The next prime is 12156793303. The reversal of 12156793291 is 19239765121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12156793291 - 2²⁵ = 12123238859 is a prime.

It is a super-2 number, since 2×12156793291² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12156793241) 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, 6078396645 + 6078396646.

It is an arithmetic number, because the mean of its divisors is an integer number (6078396646).

Almost surely, 2^12156793291 is an apocalyptic number.

12156793291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156793291 is an equidigital number, since it uses as much as digits as its factorization.

12156793291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 46.

The spelling of 12156793291 in words is "twelve billion, one hundred fifty-six million, seven hundred ninety-three thousand, two hundred ninety-one".