21023330311320 has 128 divisors (see below), whose sum is σ = 63314472312000. Its totient is φ = 5584496353280.

The previous prime is 21023330311303. The next prime is 21023330311339. The reversal of 21023330311320 is 2311303332012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218196916 + ... + 218293244.

Almost surely, 2^{21023330311320} is an apocalyptic number.

21023330311320 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 21023330311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31657236156000).

21023330311320 is an abundant number, since it is smaller than the sum of its proper divisors (42291142000680).

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

21023330311320 is a wasteful number, since it uses less digits than its factorization.

21023330311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103373 (or 103369 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21023330311320 its reverse (2311303332012), we get a palindrome (23334633643332).

The spelling of 21023330311320 in words is "twenty-one trillion, twenty-three billion, three hundred thirty million, three hundred eleven thousand, three hundred twenty".