13131431122391 has 2 divisors, whose sum is σ = 13131431122392. Its totient is φ = 13131431122390.

The previous prime is 13131431122379. The next prime is 13131431122441. The reversal of 13131431122391 is 19322113413131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13131431122391 - 2²⁶ = 13131364013527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13131431128391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565715561195 + 6565715561196.

It is an arithmetic number, because the mean of its divisors is an integer number (6565715561196).

Almost surely, 2^{13131431122391} is an apocalyptic number.

13131431122391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131431122391 is an equidigital number, since it uses as much as digits as its factorization.

13131431122391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The spelling of 13131431122391 in words is "thirteen trillion, one hundred thirty-one billion, four hundred thirty-one million, one hundred twenty-two thousand, three hundred ninety-one".