12131011031 has 8 divisors (see below), whose sum is σ = 12461323584. Its totient is φ = 11800827360.

The previous prime is 12131011021. The next prime is 12131011033. The reversal of 12131011031 is 13011013121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12131011031 is a prime.

It is a super-2 number, since 2×12131011031² (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 = 12131010997 and 12131011015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131011033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176786 + ... + 235616.

It is an arithmetic number, because the mean of its divisors is an integer number (1557665448).

Almost surely, 2^12131011031 is an apocalyptic number.

12131011031 is a deficient number, since it is larger than the sum of its proper divisors (330312553).

12131011031 is an equidigital number, since it uses as much as digits as its factorization.

12131011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64441.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 12131011031 its reverse (13011013121), we get a palindrome (25142024152).

The spelling of 12131011031 in words is "twelve billion, one hundred thirty-one million, eleven thousand, thirty-one".