22212121121000 has 32 divisors (see below), whose sum is σ = 51976363425480. Its totient is φ = 8884848448000.

The previous prime is 22212121120979. The next prime is 22212121121027. The reversal of 22212121121000 is 12112121222.

It can be written as a sum of positive squares in 4 ways, for example, as 2653986359236 + 19558134761764 = 1629106^2 + 4422458^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22212121121000.

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, 11106059561 + ... + 11106061560.

Almost surely, 2^{22212121121000} is an apocalyptic number.

22212121121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212121121000 is an abundant number, since it is smaller than the sum of its proper divisors (29764242304480).

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

22212121121000 is a wasteful number, since it uses less digits than its factorization.

22212121121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22212121142 (or 22212121128 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22212121121000 its reverse (12112121222), we get a palindrome (22224233242222).

The spelling of 22212121121000 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand".