213211311020 has 24 divisors (see below), whose sum is σ = 447824937168. Its totient is φ = 85269060800.

The previous prime is 213211311013. The next prime is 213211311073. The reversal of 213211311020 is 20113112312.

It is a self number, because there is not a number n which added to its sum of digits gives 213211311020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853091 + ... + 1074330.

It is an arithmetic number, because the mean of its divisors is an integer number (18659372382).

Almost surely, 2^213211311020 is an apocalyptic number.

213211311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213211311020 is an abundant number, since it is smaller than the sum of its proper divisors (234613626148).

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

213211311020 is a wasteful number, since it uses less digits than its factorization.

213211311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932961 (or 1932959 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213211311020 its reverse (20113112312), we get a palindrome (233324423332).

The spelling of 213211311020 in words is "two hundred thirteen billion, two hundred eleven million, three hundred eleven thousand, twenty".