22112222100 has 36 divisors (see below), whose sum is σ = 63978030144. Its totient is φ = 5896592480.

The previous prime is 22112222087. The next prime is 22112222123. The reversal of 22112222100 is 122221122.

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 22112222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36853404 + ... + 36854003.

It is an arithmetic number, because the mean of its divisors is an integer number (1777167504).

Almost surely, 2^22112222100 is an apocalyptic number.

22112222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112222100 is an abundant number, since it is smaller than the sum of its proper divisors (41865808044).

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

22112222100 is a wasteful number, since it uses less digits than its factorization.

22112222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73707424 (or 73707417 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22112222100 its reverse (122221122), we get a palindrome (22234443222).

The spelling of 22112222100 in words is "twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, one hundred".