12331212320 has 96 divisors (see below), whose sum is σ = 33556819968. Its totient is φ = 4194505728.

The previous prime is 12331212301. The next prime is 12331212323. The reversal of 12331212320 is 2321213321.

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 = 12331212292 and 12331212301.

It is not an unprimeable number, because it can be changed into a prime (12331212323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98894 + ... + 185586.

It is an arithmetic number, because the mean of its divisors is an integer number (349550208).

Almost surely, 2^12331212320 is an apocalyptic number.

12331212320 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 12331212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16778409984).

12331212320 is an abundant number, since it is smaller than the sum of its proper divisors (21225607648).

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

12331212320 is a wasteful number, since it uses less digits than its factorization.

12331212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86842 (or 86834 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12331212320 its reverse (2321213321), we get a palindrome (14652425641).

The spelling of 12331212320 in words is "twelve billion, three hundred thirty-one million, two hundred twelve thousand, three hundred twenty".