131321130020 has 24 divisors (see below), whose sum is σ = 275922637368. Its totient is φ = 52500211200.

The previous prime is 131321130007. The next prime is 131321130029. The reversal of 131321130020 is 20031123131.

It can be written as a sum of positive squares in 4 ways, for example, as 2887772644 + 128433357376 = 53738^2 + 358376^2 .

It is not an unprimeable number, because it can be changed into a prime (131321130029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726901 + ... + 1801340.

It is an arithmetic number, because the mean of its divisors is an integer number (11496776557).

Almost surely, 2^131321130020 is an apocalyptic number.

131321130020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131321130020 is an abundant number, since it is smaller than the sum of its proper divisors (144601507348).

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

131321130020 is a wasteful number, since it uses less digits than its factorization.

131321130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530111 (or 3530109 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131321130020 its reverse (20031123131), we get a palindrome (151352253151).

The spelling of 131321130020 in words is "one hundred thirty-one billion, three hundred twenty-one million, one hundred thirty thousand, twenty".