131311334020 has 96 divisors (see below), whose sum is σ = 286068627936. Its totient is φ = 50598912000.

The previous prime is 131311333999. The next prime is 131311334053. The reversal of 131311334020 is 20433113131.

It can be written as a sum of positive squares in 16 ways, for example, as 50591705476 + 80719628544 = 224926^2 + 284112^2 .

It is a super-2 number, since 2×131311334020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131311333982 and 131311334000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45325212 + ... + 45328108.

It is an arithmetic number, because the mean of its divisors is an integer number (2979881541).

Almost surely, 2^131311334020 is an apocalyptic number.

131311334020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131311334020 is an abundant number, since it is smaller than the sum of its proper divisors (154757293916).

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

131311334020 is a wasteful number, since it uses less digits than its factorization.

131311334020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721 (or 3719 counting only the distinct ones).

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

Adding to 131311334020 its reverse (20433113131), we get a palindrome (151744447151).

The spelling of 131311334020 in words is "one hundred thirty-one billion, three hundred eleven million, three hundred thirty-four thousand, twenty".