22222112111220 has 96 divisors (see below), whose sum is σ = 72845167562496. Its totient is φ = 4955453568000.

The previous prime is 22222112111219. The next prime is 22222112111237. The reversal of 22222112111220 is 2211121122222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 645224131 + ... + 645258570.

It is an arithmetic number, because the mean of its divisors is an integer number (758803828776).

Almost surely, 2^{22222112111220} is an apocalyptic number.

22222112111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222112111220 is an abundant number, since it is smaller than the sum of its proper divisors (50623055451276).

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

22222112111220 is a wasteful number, since it uses less digits than its factorization.

22222112111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290482761 (or 1290482759 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22222112111220 its reverse (2211121122222), we get a palindrome (24433233233442).

The spelling of 22222112111220 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty".