22212021221220 has 96 divisors (see below), whose sum is σ = 62253123609600. Its totient is φ = 5917544174464.

The previous prime is 22212021221167. The next prime is 22212021221239. The reversal of 22212021221220 is 2212212021222.

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, 461007091 + ... + 461055269.

It is an arithmetic number, because the mean of its divisors is an integer number (648470037600).

Almost surely, 2^{22212021221220} is an apocalyptic number.

22212021221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212021221220 is an abundant number, since it is smaller than the sum of its proper divisors (40041102388380).

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

22212021221220 is a wasteful number, since it uses less digits than its factorization.

22212021221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55377 (or 55375 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22212021221220 its reverse (2212212021222), we get a palindrome (24424233242442).

The spelling of 22212021221220 in words is "twenty-two trillion, two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty".