22121200001100 has 72 divisors (see below), whose sum is σ = 65733843351568. Its totient is φ = 5739554592000.

The previous prime is 22121200001083. The next prime is 22121200001119. The reversal of 22121200001100 is 110000212122.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 996439351 + ... + 996461550.

Almost surely, 2^{22121200001100} is an apocalyptic number.

22121200001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121200001100 is an abundant number, since it is smaller than the sum of its proper divisors (43612643350468).

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

22121200001100 is a wasteful number, since it uses less digits than its factorization.

22121200001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992900955 (or 1992900948 counting only the distinct ones).

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

Adding to 22121200001100 its reverse (110000212122), we get a palindrome (22231200213222).

The spelling of 22121200001100 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred million, one thousand, one hundred".