12312103109 has 4 divisors (see below), whose sum is σ = 12328368204. Its totient is φ = 12295838016.

The previous prime is 12312103079. The next prime is 12312103147. The reversal of 12312103109 is 90130121321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10751616100 + 1560487009 = 103690^2 + 39503^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312103109 - 2²⁸ = 12043667653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312103169) 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, 8131412 + ... + 8132925.

It is an arithmetic number, because the mean of its divisors is an integer number (3082092051).

Almost surely, 2^12312103109 is an apocalyptic number.

It is an amenable number.

12312103109 is a deficient number, since it is larger than the sum of its proper divisors (16265095).

12312103109 is an equidigital number, since it uses as much as digits as its factorization.

12312103109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265094.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 12312103109 in words is "twelve billion, three hundred twelve million, one hundred three thousand, one hundred nine".