222221001100 has 72 divisors (see below), whose sum is σ = 553720337408. Its totient is φ = 75828916800.

The previous prime is 222221001083. The next prime is 222221001133. The reversal of 222221001100 is 1100122222.

It is a happy number.

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, 604572 + ... + 899971.

Almost surely, 2^222221001100 is an apocalyptic number.

222221001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221001100 is an abundant number, since it is smaller than the sum of its proper divisors (331499336308).

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

222221001100 is a wasteful number, since it uses less digits than its factorization.

222221001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504775 (or 1504768 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222221001100 its reverse (1100122222), we get a palindrome (223321123322).

The spelling of 222221001100 in words is "two hundred twenty-two billion, two hundred twenty-one million, one thousand, one hundred".