2131331021320 has 32 divisors (see below), whose sum is σ = 4798987634520. Its totient is φ = 851911459840.

The previous prime is 2131331021291. The next prime is 2131331021363. The reversal of 2131331021320 is 231201331312.

It can be written as a sum of positive squares in 4 ways, for example, as 1844821330564 + 286509690756 = 1358242^2 + 535266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2131331021291 and 2131331021300.

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, 19349041 + ... + 19458880.

Almost surely, 2^{2131331021320} is an apocalyptic number.

2131331021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131331021320 is an abundant number, since it is smaller than the sum of its proper divisors (2667656613200).

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

2131331021320 is a wasteful number, since it uses less digits than its factorization.

2131331021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809305 (or 38809301 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2131331021320 its reverse (231201331312), we get a palindrome (2362532352632).

The spelling of 2131331021320 in words is "two trillion, one hundred thirty-one billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty".