131020311321 has 32 divisors (see below), whose sum is σ = 204507984000. Its totient is φ = 82673607744.

The previous prime is 131020311319. The next prime is 131020311347. The reversal of 131020311321 is 123113020131.

131020311321 is a `hidden beast` number, since 1 + 3 + 10 + 20 + 311 + 321 = 666.

It is not a de Polignac number, because 131020311321 - 2¹ = 131020311319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131020311294 and 131020311303.

It is not an unprimeable number, because it can be changed into a prime (131020310321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443875 + ... + 677543.

It is an arithmetic number, because the mean of its divisors is an integer number (6390874500).

Almost surely, 2^131020311321 is an apocalyptic number.

It is an amenable number.

131020311321 is a deficient number, since it is larger than the sum of its proper divisors (73487672679).

131020311321 is a wasteful number, since it uses less digits than its factorization.

131020311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234790 (or 234784 counting only the distinct ones).

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

Adding to 131020311321 its reverse (123113020131), we get a palindrome (254133331452).

The spelling of 131020311321 in words is "one hundred thirty-one billion, twenty million, three hundred eleven thousand, three hundred twenty-one".