20212022220 has 96 divisors (see below), whose sum is σ = 61681519872. Its totient is φ = 4915308288.

The previous prime is 20212022213. The next prime is 20212022231. The reversal of 20212022220 is 2222021202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212022220.

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, 91362 + ... + 220841.

It is an arithmetic number, because the mean of its divisors is an integer number (642515832).

Almost surely, 2^20212022220 is an apocalyptic number.

20212022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212022220 is an abundant number, since it is smaller than the sum of its proper divisors (41469497652).

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

20212022220 is a wasteful number, since it uses less digits than its factorization.

20212022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312311 (or 312309 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20212022220 its reverse (2222021202), we get a palindrome (22434043422).

The spelling of 20212022220 in words is "twenty billion, two hundred twelve million, twenty-two thousand, two hundred twenty".