21351522200 has 24 divisors (see below), whose sum is σ = 49642289580. Its totient is φ = 8540608800.

The previous prime is 21351522197. The next prime is 21351522233. The reversal of 21351522200 is 222515312.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 53378606 + ... + 53379005.

Almost surely, 2^21351522200 is an apocalyptic number.

21351522200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21351522200 is an abundant number, since it is smaller than the sum of its proper divisors (28290767380).

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

21351522200 is a wasteful number, since it uses less digits than its factorization.

21351522200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106757627 (or 106757618 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21351522200 in words is "twenty-one billion, three hundred fifty-one million, five hundred twenty-two thousand, two hundred".