213130031220 has 96 divisors (see below), whose sum is σ = 702075427200. Its totient is φ = 53491456512.

The previous prime is 213130031129. The next prime is 213130031239. The reversal of 213130031220 is 22130031312.

213130031220 is a `hidden beast` number, since 2 + 1 + 31 + 300 + 312 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213130031193 and 213130031202.

It is a congruent number.

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, 11599210 + ... + 11617569.

It is an arithmetic number, because the mean of its divisors is an integer number (7313285700).

Almost surely, 2^213130031220 is an apocalyptic number.

213130031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213130031220 is an abundant number, since it is smaller than the sum of its proper divisors (488945395980).

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

213130031220 is a wasteful number, since it uses less digits than its factorization.

213130031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23216814 (or 23216806 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 213130031220 its reverse (22130031312), we get a palindrome (235260062532).

The spelling of 213130031220 in words is "two hundred thirteen billion, one hundred thirty million, thirty-one thousand, two hundred twenty".