12131013031 has 4 divisors (see below), whose sum is σ = 12522336064. Its totient is φ = 11739690000.

The previous prime is 12131013019. The next prime is 12131013061. The reversal of 12131013031 is 13031013121.

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 12131013031 - 2¹⁹ = 12130488743 is a prime.

It is a super-2 number, since 2×12131013031² (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 = 12131012996 and 12131013014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131013061) 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, 195661470 + ... + 195661531.

It is an arithmetic number, because the mean of its divisors is an integer number (3130584016).

Almost surely, 2^12131013031 is an apocalyptic number.

12131013031 is a deficient number, since it is larger than the sum of its proper divisors (391323033).

12131013031 is an equidigital number, since it uses as much as digits as its factorization.

12131013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391323032.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 12131013031 its reverse (13031013121), we get a palindrome (25162026152).

The spelling of 12131013031 in words is "twelve billion, one hundred thirty-one million, thirteen thousand, thirty-one".