21021332122200 has 96 divisors (see below), whose sum is σ = 65168584032960. Its totient is φ = 5605477430400.

The previous prime is 21021332122181. The next prime is 21021332122243. The reversal of 21021332122200 is 222123312012.

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, 15617955 + ... + 16910445.

It is an arithmetic number, because the mean of its divisors is an integer number (678839417010).

Almost surely, 2^{21021332122200} is an apocalyptic number.

21021332122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021332122200 is an abundant number, since it is smaller than the sum of its proper divisors (44147251910760).

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

21021332122200 is a wasteful number, since it uses less digits than its factorization.

21021332122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319617 (or 1319608 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21021332122200 its reverse (222123312012), we get a palindrome (21243455434212).

The spelling of 21021332122200 in words is "twenty-one trillion, twenty-one billion, three hundred thirty-two million, one hundred twenty-two thousand, two hundred".