21331320000 has 140 divisors (see below), whose sum is σ = 70526717976. Its totient is φ = 5688320000.

The previous prime is 21331319951. The next prime is 21331320013. The reversal of 21331320000 is 2313312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31120 + ... + 208880.

Almost surely, 2^21331320000 is an apocalyptic number.

21331320000 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 21331320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35263358988).

21331320000 is an abundant number, since it is smaller than the sum of its proper divisors (49195397976).

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

21331320000 is an equidigital number, since it uses as much as digits as its factorization.

21331320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177796 (or 177771 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21331320000 its reverse (2313312), we get a palindrome (21333633312).

The spelling of 21331320000 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty thousand".