12131202313 has 4 divisors (see below), whose sum is σ = 12133648660. Its totient is φ = 12128755968.

The previous prime is 12131202301. The next prime is 12131202323. The reversal of 12131202313 is 31320213121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5033476809 + 7097725504 = 70947^2 + 84248^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131202313 - 2⁹ = 12131201801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131202323) 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, 1215720 + ... + 1225657.

It is an arithmetic number, because the mean of its divisors is an integer number (3033412165).

Almost surely, 2^12131202313 is an apocalyptic number.

It is an amenable number.

12131202313 is a deficient number, since it is larger than the sum of its proper divisors (2446347).

12131202313 is an equidigital number, since it uses as much as digits as its factorization.

12131202313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446346.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12131202313 its reverse (31320213121), we get a palindrome (43451415434).

The spelling of 12131202313 in words is "twelve billion, one hundred thirty-one million, two hundred two thousand, three hundred thirteen".