131020511000031 has 12 divisors (see below), whose sum is σ = 189341414725008. Its totient is φ = 87305669409024.

The previous prime is 131020510999949. The next prime is 131020511000053. The reversal of 131020511000031 is 130000115020131.

131020511000031 is a `hidden beast` number, since 131 + 0 + 20 + 511 + 0 + 0 + 0 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 131020511000031 - 2³³ = 131011921065439 is a prime.

It is a super-2 number, since 2×131020511000031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131020510999968 and 131020511000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131020511020031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3444806955 + ... + 3444844988.

It is an arithmetic number, because the mean of its divisors is an integer number (15778451227084).

Almost surely, 2^{131020511000031} is an apocalyptic number.

131020511000031 is a deficient number, since it is larger than the sum of its proper divisors (58320903724977).

131020511000031 is a wasteful number, since it uses less digits than its factorization.

131020511000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889654062 (or 6889654059 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 131020511000031 its reverse (130000115020131), we get a palindrome (261020626020162).

The spelling of 131020511000031 in words is "one hundred thirty-one trillion, twenty billion, five hundred eleven million, thirty-one", and thus it is an aban number.