12791231131 has 4 divisors (see below), whose sum is σ = 14618549872. Its totient is φ = 10963912392.

The previous prime is 12791231107. The next prime is 12791231203. The reversal of 12791231131 is 13113219721.

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

It is a cyclic number.

It is not a de Polignac number, because 12791231131 - 2⁹ = 12791230619 is a prime.

It is a super-2 number, since 2×12791231131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12791231093 and 12791231102.

It is not an unprimeable number, because it can be changed into a prime (12791231731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913659360 + ... + 913659373.

It is an arithmetic number, because the mean of its divisors is an integer number (3654637468).

Almost surely, 2^12791231131 is an apocalyptic number.

12791231131 is a deficient number, since it is larger than the sum of its proper divisors (1827318741).

12791231131 is an equidigital number, since it uses as much as digits as its factorization.

12791231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827318740.

The product of its digits is 2268, while the sum is 31.

The spelling of 12791231131 in words is "twelve billion, seven hundred ninety-one million, two hundred thirty-one thousand, one hundred thirty-one".