22121021210100 has 36 divisors (see below), whose sum is σ = 64003488035424. Its totient is φ = 5898938989280.

The previous prime is 22121021210087. The next prime is 22121021210143. The reversal of 22121021210100 is 101212012122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22121021210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36868368384 + ... + 36868368983.

Almost surely, 2^{22121021210100} is an apocalyptic number.

22121021210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121021210100 is an abundant number, since it is smaller than the sum of its proper divisors (41882466825324).

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

22121021210100 is a wasteful number, since it uses less digits than its factorization.

22121021210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73736737384 (or 73736737377 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121021210100 its reverse (101212012122), we get a palindrome (22222233222222).

The spelling of 22121021210100 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one million, two hundred ten thousand, one hundred".