22121000202112 has 64 divisors (see below), whose sum is σ = 51315056172000. Its totient is φ = 9301552625664.

The previous prime is 22121000202097. The next prime is 22121000202113. The reversal of 22121000202112 is 21120200012122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121000202113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232863987 + ... + 232958962.

Almost surely, 2^{22121000202112} is an apocalyptic number.

It is an amenable number.

22121000202112 is an abundant number, since it is smaller than the sum of its proper divisors (29194055969888).

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

22121000202112 is an equidigital number, since it uses as much as digits as its factorization.

22121000202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465823023 (or 465823011 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121000202112 its reverse (21120200012122), we get a palindrome (43241200214234).

The spelling of 22121000202112 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred two thousand, one hundred twelve".