12312003320 has 32 divisors (see below), whose sum is σ = 28156144320. Its totient is φ = 4844065920.

The previous prime is 12312003317. The next prime is 12312003329. The reversal of 12312003320 is 2330021321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312003329) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2520512 + ... + 2525391.

It is an arithmetic number, because the mean of its divisors is an integer number (879879510).

Almost surely, 2^12312003320 is an apocalyptic number.

12312003320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312003320 is an abundant number, since it is smaller than the sum of its proper divisors (15844141000).

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

12312003320 is a wasteful number, since it uses less digits than its factorization.

12312003320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045975 (or 5045971 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 12312003320 its reverse (2330021321), we get a palindrome (14642024641).

The spelling of 12312003320 in words is "twelve billion, three hundred twelve million, three thousand, three hundred twenty".