222221221000 has 32 divisors (see below), whose sum is σ = 519997659480. Its totient is φ = 88888488000.

The previous prime is 222221220997. The next prime is 222221221043. The reversal of 222221221000 is 122122222.

It can be written as a sum of positive squares in 4 ways, for example, as 53574657444 + 168646563556 = 231462^2 + 410666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111109611 + ... + 111111610.

Almost surely, 2^222221221000 is an apocalyptic number.

222221221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221221000 is an abundant number, since it is smaller than the sum of its proper divisors (297776438480).

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

222221221000 is a wasteful number, since it uses less digits than its factorization.

222221221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222221242 (or 222221228 counting only the distinct ones).

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

Adding to 222221221000 its reverse (122122222), we get a palindrome (222343343222).

The spelling of 222221221000 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand".