12031312103 has 2 divisors, whose sum is σ = 12031312104. Its totient is φ = 12031312102.

The previous prime is 12031312093. The next prime is 12031312123. The reversal of 12031312103 is 30121313021.

It is a weak prime.

It is an emirp because it is prime and its reverse (30121313021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031312103 - 2¹² = 12031308007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031312123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015656051 + 6015656052.

It is an arithmetic number, because the mean of its divisors is an integer number (6015656052).

Almost surely, 2^12031312103 is an apocalyptic number.

12031312103 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031312103 is an equidigital number, since it uses as much as digits as its factorization.

12031312103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12031312103 its reverse (30121313021), we get a palindrome (42152625124).

The spelling of 12031312103 in words is "twelve billion, thirty-one million, three hundred twelve thousand, one hundred three".