21322331011320 has 128 divisors (see below), whose sum is σ = 64638421286400. Its totient is φ = 5626358567424.

The previous prime is 21322331011187. The next prime is 21322331011321. The reversal of 21322331011320 is 2311013322312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322331011321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15185586 + ... + 16530174.

It is an arithmetic number, because the mean of its divisors is an integer number (504987666300).

Almost surely, 2^{21322331011320} is an apocalyptic number.

21322331011320 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 21322331011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32319210643200).

21322331011320 is an abundant number, since it is smaller than the sum of its proper divisors (43316090275080).

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

21322331011320 is a wasteful number, since it uses less digits than its factorization.

21322331011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345989 (or 1345985 counting only the distinct ones).

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

Adding to 21322331011320 its reverse (2311013322312), we get a palindrome (23633344333632).

The spelling of 21322331011320 in words is "twenty-one trillion, three hundred twenty-two billion, three hundred thirty-one million, eleven thousand, three hundred twenty".