22221021211100 has 72 divisors (see below), whose sum is σ = 49482216800016. Its totient is φ = 8656430400000.

The previous prime is 22221021211093. The next prime is 22221021211127. The reversal of 22221021211100 is 111212012222.

It is a super-2 number, since 2×22221021211100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2404751 + ... + 7086950.

Almost surely, 2^{22221021211100} is an apocalyptic number.

22221021211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221021211100 is an abundant number, since it is smaller than the sum of its proper divisors (27261195588916).

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

22221021211100 is a wasteful number, since it uses less digits than its factorization.

22221021211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492327 (or 9492320 counting only the distinct ones).

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

Adding to 22221021211100 its reverse (111212012222), we get a palindrome (22332233223322).

The spelling of 22221021211100 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-one million, two hundred eleven thousand, one hundred".