21331222323100 has 36 divisors (see below), whose sum is σ = 46336131110304. Its totient is φ = 8523755534080.

The previous prime is 21331222323083. The next prime is 21331222323109. The reversal of 21331222323100 is 132322213312.

It is a super-2 number, since 2×21331222323100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331222323109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109069252 + ... + 109264651.

It is an arithmetic number, because the mean of its divisors is an integer number (1287114753064).

Almost surely, 2^{21331222323100} is an apocalyptic number.

21331222323100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331222323100 is an abundant number, since it is smaller than the sum of its proper divisors (25004908787204).

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

21331222323100 is a wasteful number, since it uses less digits than its factorization.

21331222323100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218334894 (or 218334887 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21331222323100 its reverse (132322213312), we get a palindrome (21463544536412).

The spelling of 21331222323100 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, one hundred".