22121221011200 has 54 divisors (see below), whose sum is σ = 54753478459344. Its totient is φ = 8848488401920.

The previous prime is 22121221011199. The next prime is 22121221011301. The reversal of 22121221011200 is 211012212122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1728213992 + ... + 1728226791.

Almost surely, 2^{22121221011200} is an apocalyptic number.

22121221011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121221011200 is an abundant number, since it is smaller than the sum of its proper divisors (32632257448144).

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

22121221011200 is an equidigital number, since it uses as much as digits as its factorization.

22121221011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456440809 (or 3456440790 counting only the distinct ones).

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

Adding to 22121221011200 its reverse (211012212122), we get a palindrome (22332233223322).

The spelling of 22121221011200 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred".