21321922200 has 96 divisors (see below), whose sum is σ = 66131511360. Its totient is φ = 5682960000.

The previous prime is 21321922199. The next prime is 21321922211. The reversal of 21321922200 is 222912312.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 23 ways as a sum of consecutive naturals, for example, 1342707 + ... + 1358493.

It is an arithmetic number, because the mean of its divisors is an integer number (688869910).

Almost surely, 2^21321922200 is an apocalyptic number.

21321922200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321922200 is an abundant number, since it is smaller than the sum of its proper divisors (44809589160).

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

21321922200 is a wasteful number, since it uses less digits than its factorization.

21321922200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18057 (or 18048 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 21321922200 in words is "twenty-one billion, three hundred twenty-one million, nine hundred twenty-two thousand, two hundred".