131031123102 has 48 divisors (see below), whose sum is σ = 309734156160. Its totient is φ = 39703294800.

The previous prime is 131031123101. The next prime is 131031123107. The reversal of 131031123102 is 201321130131.

131031123102 is a `hidden beast` number, since 1 + 310 + 31 + 12 + 310 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031123101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4541799 + ... + 4570557.

It is an arithmetic number, because the mean of its divisors is an integer number (6452794920).

Almost surely, 2^131031123102 is an apocalyptic number.

131031123102 is an abundant number, since it is smaller than the sum of its proper divisors (178703033058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131031123102 is a wasteful number, since it uses less digits than its factorization.

131031123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51789 (or 51786 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 131031123102 its reverse (201321130131), we get a palindrome (332352253233).

The spelling of 131031123102 in words is "one hundred thirty-one billion, thirty-one million, one hundred twenty-three thousand, one hundred two".