12777192131 has 4 divisors (see below), whose sum is σ = 13938755064. Its totient is φ = 11615629200.

The previous prime is 12777192121. The next prime is 12777192151. The reversal of 12777192131 is 13129177721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12777192131 is a prime.

It is a super-2 number, since 2×12777192131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12777192101) 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 in 3 ways as a sum of consecutive naturals, for example, 580781450 + ... + 580781471.

It is an arithmetic number, because the mean of its divisors is an integer number (3484688766).

Almost surely, 2^12777192131 is an apocalyptic number.

12777192131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12777192131 is a deficient number, since it is larger than the sum of its proper divisors (1161562933).

12777192131 is a wasteful number, since it uses less digits than its factorization.

12777192131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161562932.

The product of its digits is 37044, while the sum is 41.

The spelling of 12777192131 in words is "twelve billion, seven hundred seventy-seven million, one hundred ninety-two thousand, one hundred thirty-one".