22121002010100 has 144 divisors (see below), whose sum is σ = 73290490358400. Its totient is φ = 5046295134720.

The previous prime is 22121002010099. The next prime is 22121002010117. The reversal of 22121002010100 is 101020012122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9278655 + ... + 11416454.

It is an arithmetic number, because the mean of its divisors is an integer number (508961738600).

Almost surely, 2^{22121002010100} is an apocalyptic number.

22121002010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121002010100 is an abundant number, since it is smaller than the sum of its proper divisors (51169488348300).

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

22121002010100 is a wasteful number, since it uses less digits than its factorization.

22121002010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695642 (or 20695635 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22121002010100 its reverse (101020012122), we get a palindrome (22222022022222).

The spelling of 22121002010100 in words is "twenty-two trillion, one hundred twenty-one billion, two million, ten thousand, one hundred".