12312311320 has 16 divisors (see below), whose sum is σ = 27702700560. Its totient is φ = 4924924512.

The previous prime is 12312311299. The next prime is 12312311329. The reversal of 12312311320 is 2311321321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312311329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153903852 + ... + 153903931.

It is an arithmetic number, because the mean of its divisors is an integer number (1731418785).

Almost surely, 2^12312311320 is an apocalyptic number.

12312311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312311320 is an abundant number, since it is smaller than the sum of its proper divisors (15390389240).

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

12312311320 is a wasteful number, since it uses less digits than its factorization.

12312311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307807794 (or 307807790 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12312311320 its reverse (2311321321), we get a palindrome (14623632641).

The spelling of 12312311320 in words is "twelve billion, three hundred twelve million, three hundred eleven thousand, three hundred twenty".