22121000102000 has 80 divisors (see below), whose sum is σ = 53492086537344. Its totient is φ = 8847819680000.

The previous prime is 22121000101969. The next prime is 22121000102027. The reversal of 22121000102000 is 20100012122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30807065 + ... + 31516935.

Almost surely, 2^{22121000102000} is an apocalyptic number.

22121000102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121000102000 is an abundant number, since it is smaller than the sum of its proper divisors (31371086435344).

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

22121000102000 is a wasteful number, since it uses less digits than its factorization.

22121000102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725475 (or 725459 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22121000102000 its reverse (20100012122), we get a palindrome (22141100114122).

The spelling of 22121000102000 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two thousand".