12012317209 has 4 divisors (see below), whose sum is σ = 12014044416. Its totient is φ = 12010590004.

The previous prime is 12012317201. The next prime is 12012317269. The reversal of 12012317209 is 90271321021.

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 12012317209 - 2³ = 12012317201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012317201) 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, 853129 + ... + 867094.

It is an arithmetic number, because the mean of its divisors is an integer number (3003511104).

Almost surely, 2^12012317209 is an apocalyptic number.

It is an amenable number.

12012317209 is a deficient number, since it is larger than the sum of its proper divisors (1727207).

12012317209 is an equidigital number, since it uses as much as digits as its factorization.

12012317209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727206.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 12012317209 in words is "twelve billion, twelve million, three hundred seventeen thousand, two hundred nine".