222212021100 has 72 divisors (see below), whose sum is σ = 660310060368. Its totient is φ = 57655008000.

The previous prime is 222212021077. The next prime is 222212021111. The reversal of 222212021100 is 1120212222.

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 222212021100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9998451 + ... + 10020650.

Almost surely, 2^222212021100 is an apocalyptic number.

222212021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222212021100 is an abundant number, since it is smaller than the sum of its proper divisors (438098039268).

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

222212021100 is a wasteful number, since it uses less digits than its factorization.

222212021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20019155 (or 20019148 counting only the distinct ones).

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

Adding to 222212021100 its reverse (1120212222), we get a palindrome (223332233322).

The spelling of 222212021100 in words is "two hundred twenty-two billion, two hundred twelve million, twenty-one thousand, one hundred".