213131304031020 has 48 divisors (see below), whose sum is σ = 597019346181888. Its totient is φ = 56811043465920.

The previous prime is 213131304030991. The next prime is 213131304031027. The reversal of 213131304031020 is 20130403131312.

It is a super-2 number, since 2×213131304031020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213131304031027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748948504 + ... + 749233023.

It is an arithmetic number, because the mean of its divisors is an integer number (12437903045456).

Almost surely, 2^{213131304031020} is an apocalyptic number.

213131304031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213131304031020 is an abundant number, since it is smaller than the sum of its proper divisors (383888042150868).

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

213131304031020 is a wasteful number, since it uses less digits than its factorization.

213131304031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498183910 (or 1498183908 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 213131304031020 its reverse (20130403131312), we get a palindrome (233261707162332).

The spelling of 213131304031020 in words is "two hundred thirteen trillion, one hundred thirty-one billion, three hundred four million, thirty-one thousand, twenty".