131312232111031 has 4 divisors (see below), whose sum is σ = 132539449233672. Its totient is φ = 130085014988392.

The previous prime is 131312232111017. The next prime is 131312232111043. The reversal of 131312232111031 is 130111232213131.

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 131312232111031 - 2⁷ = 131312232110903 is a prime.

It is a super-2 number, since 2×131312232111031² (a number of 29 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 = 131312232110987 and 131312232111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312232111091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613608561160 + ... + 613608561373.

It is an arithmetic number, because the mean of its divisors is an integer number (33134862308418).

Almost surely, 2^{131312232111031} is an apocalyptic number.

131312232111031 is a deficient number, since it is larger than the sum of its proper divisors (1227217122641).

131312232111031 is a wasteful number, since it uses less digits than its factorization.

131312232111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227217122640.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 131312232111031 its reverse (130111232213131), we get a palindrome (261423464324162).

The spelling of 131312232111031 in words is "one hundred thirty-one trillion, three hundred twelve billion, two hundred thirty-two million, one hundred eleven thousand, thirty-one".