213231131113220 has 48 divisors (see below), whose sum is σ = 491024189351808. Its totient is φ = 77136838748160.

The previous prime is 213231131113213. The next prime is 213231131113241. The reversal of 213231131113220 is 22311131132312.

It is a self number, because there is not a number n which added to its sum of digits gives 213231131113220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2510922344 + ... + 2511007263.

It is an arithmetic number, because the mean of its divisors is an integer number (10229670611496).

Almost surely, 2^{213231131113220} is an apocalyptic number.

213231131113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231131113220 is an abundant number, since it is smaller than the sum of its proper divisors (277793058238588).

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

213231131113220 is a wasteful number, since it uses less digits than its factorization.

213231131113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021929820 (or 5021929818 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 213231131113220 its reverse (22311131132312), we get a palindrome (235542262245532).

The spelling of 213231131113220 in words is "two hundred thirteen trillion, two hundred thirty-one billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred twenty".