21122312200 has 96 divisors (see below), whose sum is σ = 55903296960. Its totient is φ = 7346873600.

The previous prime is 21122312173. The next prime is 21122312249. The reversal of 21122312200 is 221322112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158119 + ... + 259318.

It is an arithmetic number, because the mean of its divisors is an integer number (582326010).

Almost surely, 2^21122312200 is an apocalyptic number.

21122312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122312200 is an abundant number, since it is smaller than the sum of its proper divisors (34780984760).

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

21122312200 is a wasteful number, since it uses less digits than its factorization.

21122312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417487 (or 417478 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21122312200 its reverse (221322112), we get a palindrome (21343634312).

The spelling of 21122312200 in words is "twenty-one billion, one hundred twenty-two million, three hundred twelve thousand, two hundred".