21321113330220 has 96 divisors (see below), whose sum is σ = 65334381719040. Its totient is φ = 5152241103360.

The previous prime is 21321113330219. The next prime is 21321113330249. The reversal of 21321113330220 is 2203331112312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51398400 + ... + 51811559.

It is an arithmetic number, because the mean of its divisors is an integer number (680566476240).

Almost surely, 2^{21321113330220} is an apocalyptic number.

21321113330220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321113330220 is an abundant number, since it is smaller than the sum of its proper divisors (44013268388820).

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

21321113330220 is a wasteful number, since it uses less digits than its factorization.

21321113330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103210295 (or 103210293 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21321113330220 its reverse (2203331112312), we get a palindrome (23524444442532).

The spelling of 21321113330220 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirteen million, three hundred thirty thousand, two hundred twenty".