21202112200 has 24 divisors (see below), whose sum is σ = 49294911330. Its totient is φ = 8480844800.

The previous prime is 21202112153. The next prime is 21202112201. The reversal of 21202112200 is 221120212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11694692164 + 9507420036 = 108142^2 + 97506^2 .

It is not an unprimeable number, because it can be changed into a prime (21202112201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53005081 + ... + 53005480.

Almost surely, 2^21202112200 is an apocalyptic number.

21202112200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202112200 is an abundant number, since it is smaller than the sum of its proper divisors (28092799130).

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

21202112200 is a wasteful number, since it uses less digits than its factorization.

21202112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106010577 (or 106010568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202112200 its reverse (221120212), we get a palindrome (21423232412).

The spelling of 21202112200 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred".