131031123320 has 32 divisors (see below), whose sum is σ = 295305782400. Its totient is φ = 52326092928.

The previous prime is 131031123263. The next prime is 131031123343. The reversal of 131031123320 is 23321130131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131031123292 and 131031123301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2674055 + ... + 2722614.

It is an arithmetic number, because the mean of its divisors is an integer number (9228305700).

Almost surely, 2^131031123320 is an apocalyptic number.

131031123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131031123320 is an abundant number, since it is smaller than the sum of its proper divisors (164274659080).

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

131031123320 is a wasteful number, since it uses less digits than its factorization.

131031123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397287 (or 5397283 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131031123320 its reverse (23321130131), we get a palindrome (154352253451).

The spelling of 131031123320 in words is "one hundred thirty-one billion, thirty-one million, one hundred twenty-three thousand, three hundred twenty".