222012121100 has 72 divisors (see below), whose sum is σ = 600643723008. Its totient is φ = 69198580800.

The previous prime is 222012121087. The next prime is 222012121117. The reversal of 222012121100 is 1121210222.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 14408672 + ... + 14424071.

Almost surely, 2^222012121100 is an apocalyptic number.

222012121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222012121100 is an abundant number, since it is smaller than the sum of its proper divisors (378631601908).

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

222012121100 is a wasteful number, since it uses less digits than its factorization.

222012121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28832775 (or 28832768 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 222012121100 its reverse (1121210222), we get a palindrome (223133331322).

The spelling of 222012121100 in words is "two hundred twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred".