213221100212220 has 24 divisors (see below), whose sum is σ = 597019080594384. Its totient is φ = 56858960056576.

The previous prime is 213221100212203. The next prime is 213221100212249. The reversal of 213221100212220 is 22212001122312.

It is a congruent number.

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, 1776842501709 + ... + 1776842501828.

It is an arithmetic number, because the mean of its divisors is an integer number (24875795024766).

Almost surely, 2^{213221100212220} is an apocalyptic number.

213221100212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213221100212220 is an abundant number, since it is smaller than the sum of its proper divisors (383797980382164).

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

213221100212220 is a wasteful number, since it uses less digits than its factorization.

213221100212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553685003549 (or 3553685003547 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 213221100212220 its reverse (22212001122312), we get a palindrome (235433101334532).

The spelling of 213221100212220 in words is "two hundred thirteen trillion, two hundred twenty-one billion, one hundred million, two hundred twelve thousand, two hundred twenty".