21322312200 has 144 divisors (see below), whose sum is σ = 81837113280. Its totient is φ = 4873668480.

The previous prime is 21322312189. The next prime is 21322312223. The reversal of 21322312200 is 221322312.

21322312200 is a `hidden beast` number, since 213 + 2 + 231 + 220 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 833524 + ... + 858723.

Almost surely, 2^21322312200 is an apocalyptic number.

21322312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322312200 is an abundant number, since it is smaller than the sum of its proper divisors (60514801080).

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

21322312200 is a wasteful number, since it uses less digits than its factorization.

21322312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692276 (or 1692264 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21322312200 its reverse (221322312), we get a palindrome (21543634512).

The spelling of 21322312200 in words is "twenty-one billion, three hundred twenty-two million, three hundred twelve thousand, two hundred".