131020031320 has 96 divisors (see below), whose sum is σ = 302784719760. Its totient is φ = 51024204800.

The previous prime is 131020031309. The next prime is 131020031347. The reversal of 131020031320 is 23130020131.

It is a junction number, because it is equal to n+sod(n) for n = 131020031294 and 131020031303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37854390 + ... + 37857850.

Almost surely, 2^131020031320 is an apocalyptic number.

131020031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131020031320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151392359880).

131020031320 is an abundant number, since it is smaller than the sum of its proper divisors (171764688440).

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

131020031320 is a wasteful number, since it uses less digits than its factorization.

131020031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117 (or 4072 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 131020031320 its reverse (23130020131), we get a palindrome (154150051451).

The spelling of 131020031320 in words is "one hundred thirty-one billion, twenty million, thirty-one thousand, three hundred twenty".