12312103112 has 32 divisors (see below), whose sum is σ = 23194132920. Its totient is φ = 6127042560.

The previous prime is 12312103079. The next prime is 12312103147. The reversal of 12312103112 is 21130121321.

It can be written as a sum of positive squares in 4 ways, for example, as 10889757316 + 1422345796 = 104354^2 + 37714^2 .

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 7 ways as a sum of consecutive naturals, for example, 4400498 + ... + 4403294.

Almost surely, 2^12312103112 is an apocalyptic number.

It is an amenable number.

12312103112 is a deficient number, since it is larger than the sum of its proper divisors (10882029808).

12312103112 is a wasteful number, since it uses less digits than its factorization.

12312103112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12312103112 its reverse (21130121321), we get a palindrome (33442224433).

The spelling of 12312103112 in words is "twelve billion, three hundred twelve million, one hundred three thousand, one hundred twelve".