12012103131209 has 4 divisors (see below), whose sum is σ = 12016613874816. Its totient is φ = 12007592387604.

The previous prime is 12012103131157. The next prime is 12012103131247. The reversal of 12012103131209 is 90213130121021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12012103131209 - 2²⁸ = 12011834695753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012103121209) 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, 2255367809 + ... + 2255373134.

It is an arithmetic number, because the mean of its divisors is an integer number (3004153468704).

Almost surely, 2^{12012103131209} is an apocalyptic number.

It is an amenable number.

12012103131209 is a deficient number, since it is larger than the sum of its proper divisors (4510743607).

12012103131209 is an equidigital number, since it uses as much as digits as its factorization.

12012103131209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510743606.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 12012103131209 in words is "twelve trillion, twelve billion, one hundred three million, one hundred thirty-one thousand, two hundred nine".