22000222121000 has 128 divisors (see below), whose sum is σ = 56388400192800. Its totient is φ = 7996835123200.

The previous prime is 22000222120979. The next prime is 22000222121011. The reversal of 22000222121000 is 12122200022.

It can be written as a sum of positive squares in 16 ways, for example, as 24209492836 + 21976012628164 = 155594^2 + 4687858^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21819599 + ... + 22805598.

Almost surely, 2^{22000222121000} is an apocalyptic number.

22000222121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000222121000 is an abundant number, since it is smaller than the sum of its proper divisors (34388178071800).

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

22000222121000 is a wasteful number, since it uses less digits than its factorization.

22000222121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44625264 (or 44625250 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22000222121000 its reverse (12122200022), we get a palindrome (22012344321022).

The spelling of 22000222121000 in words is "twenty-two trillion, two hundred twenty-two million, one hundred twenty-one thousand".