21230320330100 has 72 divisors (see below), whose sum is σ = 53644613275008. Its totient is φ = 7141627958400.

The previous prime is 21230320330027. The next prime is 21230320330187. The reversal of 21230320330100 is 103302303212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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, 286085816 + ... + 286160015.

It is an arithmetic number, because the mean of its divisors is an integer number (745064073264).

Almost surely, 2^{21230320330100} is an apocalyptic number.

21230320330100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230320330100 is an abundant number, since it is smaller than the sum of its proper divisors (32414292944908).

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

21230320330100 is a wasteful number, since it uses less digits than its factorization.

21230320330100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572245905 (or 572245898 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21230320330100 its reverse (103302303212), we get a palindrome (21333622633312).

The spelling of 21230320330100 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty million, three hundred thirty thousand, one hundred".