21132232200 has 72 divisors (see below), whose sum is σ = 70969085850. Its totient is φ = 5635261440.

The previous prime is 21132232153. The next prime is 21132232201. The reversal of 21132232200 is 223223112.

21132232200 is a `hidden beast` number, since 21 + 1 + 322 + 322 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 11704210596 + 9428021604 = 108186^2 + 97098^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (21132232201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5868265 + ... + 5871864.

Almost surely, 2^21132232200 is an apocalyptic number.

21132232200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132232200 is an abundant number, since it is smaller than the sum of its proper divisors (49836853650).

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

21132232200 is a wasteful number, since it uses less digits than its factorization.

21132232200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11740151 (or 11740139 counting only the distinct ones).

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

Adding to 21132232200 its reverse (223223112), we get a palindrome (21355455312).

The spelling of 21132232200 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirty-two thousand, two hundred".