131324520543021 has 32 divisors (see below), whose sum is σ = 209523455872640. Its totient is φ = 80813989008000.

The previous prime is 131324520542921. The next prime is 131324520543079. The reversal of 131324520543021 is 120345025423131.

131324520543021 is a `hidden beast` number, since 1 + 3 + 1 + 32 + 4 + 520 + 54 + 30 + 21 = 666.

It is not a de Polignac number, because 131324520543021 - 2²³ = 131324512154413 is a prime.

It is a super-2 number, since 2×131324520543021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131324520543421) 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, 23646546 + ... + 28667196.

It is an arithmetic number, because the mean of its divisors is an integer number (6547607996020).

Almost surely, 2^{131324520543021} is an apocalyptic number.

It is an amenable number.

131324520543021 is a deficient number, since it is larger than the sum of its proper divisors (78198935329619).

131324520543021 is a wasteful number, since it uses less digits than its factorization.

131324520543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095194 (or 5095188 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 131324520543021 its reverse (120345025423131), we get a palindrome (251669545966152).

The spelling of 131324520543021 in words is "one hundred thirty-one trillion, three hundred twenty-four billion, five hundred twenty million, five hundred forty-three thousand, twenty-one".