12321303320 has 64 divisors (see below), whose sum is σ = 29193912000. Its totient is φ = 4670949888.

The previous prime is 12321303311. The next prime is 12321303383. The reversal of 12321303320 is 2330312321.

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

It is a junction number, because it is equal to n+sod(n) for n = 12321303292 and 12321303301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38846 + ... + 161714.

It is an arithmetic number, because the mean of its divisors is an integer number (456154875).

Almost surely, 2^12321303320 is an apocalyptic number.

12321303320 is a gapful number since it is divisible by the number (10) 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 12321303320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14596956000).

12321303320 is an abundant number, since it is smaller than the sum of its proper divisors (16872608680).

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

12321303320 is a wasteful number, since it uses less digits than its factorization.

12321303320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123012 (or 123008 counting only the distinct ones).

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

Adding to 12321303320 its reverse (2330312321), we get a palindrome (14651615641).

Subtracting from 12321303320 its reverse (2330312321), we obtain a palindrome (9990990999).

The spelling of 12321303320 in words is "twelve billion, three hundred twenty-one million, three hundred three thousand, three hundred twenty".