202112212220 has 24 divisors (see below), whose sum is σ = 449402449104. Its totient is φ = 76089303296.

The previous prime is 202112212157. The next prime is 202112212231. The reversal of 202112212220 is 22212211202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297223502 + ... + 297224181.

It is an arithmetic number, because the mean of its divisors is an integer number (18725102046).

Almost surely, 2^202112212220 is an apocalyptic number.

202112212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202112212220 is an abundant number, since it is smaller than the sum of its proper divisors (247290236884).

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

202112212220 is a wasteful number, since it uses less digits than its factorization.

202112212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594447709 (or 594447707 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202112212220 its reverse (22212211202), we get a palindrome (224324423422).

The spelling of 202112212220 in words is "two hundred two billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty".