21321121312200 has 96 divisors (see below), whose sum is σ = 69983445281760. Its totient is φ = 5351183385600.

The previous prime is 21321121312177. The next prime is 21321121312207. The reversal of 21321121312200 is 221312112312.

21321121312200 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21321121312207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1045142806 + ... + 1045163205.

It is an arithmetic number, because the mean of its divisors is an integer number (728994221685).

Almost surely, 2^{21321121312200} is an apocalyptic number.

21321121312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321121312200 is an abundant number, since it is smaller than the sum of its proper divisors (48662323969560).

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

21321121312200 is a wasteful number, since it uses less digits than its factorization.

21321121312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090306047 (or 2090306038 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21321121312200 its reverse (221312112312), we get a palindrome (21542433424512).

The spelling of 21321121312200 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-one million, three hundred twelve thousand, two hundred".