12009139217 has 2 divisors, whose sum is σ = 12009139218. Its totient is φ = 12009139216.

The previous prime is 12009139199. The next prime is 12009139229. The reversal of 12009139217 is 71293190021.

12009139217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7871948176 + 4137191041 = 88724^2 + 64321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12009139217 - 2¹⁴ = 12009122833 is a prime.

It is not a weakly prime, because it can be changed into another prime (12009139117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004569608 + 6004569609.

It is an arithmetic number, because the mean of its divisors is an integer number (6004569609).

Almost surely, 2^12009139217 is an apocalyptic number.

It is an amenable number.

12009139217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12009139217 is an equidigital number, since it uses as much as digits as its factorization.

12009139217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 12009139217 in words is "twelve billion, nine million, one hundred thirty-nine thousand, two hundred seventeen".