21232321300 has 72 divisors (see below), whose sum is σ = 46700136000. Its totient is φ = 8377854720.

The previous prime is 21232321291. The next prime is 21232321379. The reversal of 21232321300 is 312323212.

It is a super-2 number, since 2×21232321300² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6962176 + ... + 6965224.

It is an arithmetic number, because the mean of its divisors is an integer number (648613000).

Almost surely, 2^21232321300 is an apocalyptic number.

21232321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21232321300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23350068000).

21232321300 is an abundant number, since it is smaller than the sum of its proper divisors (25467814700).

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

21232321300 is a wasteful number, since it uses less digits than its factorization.

21232321300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985 (or 3978 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21232321300 its reverse (312323212), we get a palindrome (21544644512).

The spelling of 21232321300 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-one thousand, three hundred".