13131202431013 has 4 divisors (see below), whose sum is σ = 13131219863680. Its totient is φ = 13131184998348.

The previous prime is 13131202430959. The next prime is 13131202431043. The reversal of 13131202431013 is 31013420213131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13131202431013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131202431043) 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, 7532895 + ... + 9110812.

It is an arithmetic number, because the mean of its divisors is an integer number (3282804965920).

Almost surely, 2^{13131202431013} is an apocalyptic number.

It is an amenable number.

13131202431013 is a deficient number, since it is larger than the sum of its proper divisors (17432667).

13131202431013 is an equidigital number, since it uses as much as digits as its factorization.

13131202431013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432666.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13131202431013 its reverse (31013420213131), we get a palindrome (44144622644144).

The spelling of 13131202431013 in words is "thirteen trillion, one hundred thirty-one billion, two hundred two million, four hundred thirty-one thousand, thirteen".