12207903217 has 4 divisors (see below), whose sum is σ = 12505656996. Its totient is φ = 11910149440.

The previous prime is 12207903179. The next prime is 12207903263. The reversal of 12207903217 is 71230970221.

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 6871746816 + 5336156401 = 82896^2 + 73049^2 .

It is a cyclic number.

It is not a de Polignac number, because 12207903217 - 2¹⁵ = 12207870449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12207903517) 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, 148876828 + ... + 148876909.

It is an arithmetic number, because the mean of its divisors is an integer number (3126414249).

Almost surely, 2^12207903217 is an apocalyptic number.

It is an amenable number.

12207903217 is a deficient number, since it is larger than the sum of its proper divisors (297753779).

12207903217 is an equidigital number, since it uses as much as digits as its factorization.

12207903217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297753778.

The product of its (nonzero) digits is 10584, while the sum is 34.

The spelling of 12207903217 in words is "twelve billion, two hundred seven million, nine hundred three thousand, two hundred seventeen".