213120322220 has 24 divisors (see below), whose sum is σ = 481979806224. Its totient is φ = 78690580416.

The previous prime is 213120322213. The next prime is 213120322243. The reversal of 213120322220 is 22223021312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 213120322192 and 213120322201.

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, 409846514 + ... + 409847033.

It is an arithmetic number, because the mean of its divisors is an integer number (20082491926).

Almost surely, 2^213120322220 is an apocalyptic number.

213120322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213120322220 is an abundant number, since it is smaller than the sum of its proper divisors (268859484004).

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

213120322220 is a wasteful number, since it uses less digits than its factorization.

213120322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819693569 (or 819693567 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 213120322220 its reverse (22223021312), we get a palindrome (235343343532).

The spelling of 213120322220 in words is "two hundred thirteen billion, one hundred twenty million, three hundred twenty-two thousand, two hundred twenty".