222222021100 has 18 divisors (see below), whose sum is σ = 482221786004. Its totient is φ = 88888808400.

The previous prime is 222222021059. The next prime is 222222021101. The reversal of 222222021100 is 1120222222.

It is not an unprimeable number, because it can be changed into a prime (222222021101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111110006 + ... + 1111110205.

Almost surely, 2^222222021100 is an apocalyptic number.

222222021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222021100 is an abundant number, since it is smaller than the sum of its proper divisors (259999764904).

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

222222021100 is a wasteful number, since it uses less digits than its factorization.

222222021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222220225 (or 2222220218 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222222021100 its reverse (1120222222), we get a palindrome (223342243322).

The spelling of 222222021100 in words is "two hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, one hundred".