12051221306317 has 4 divisors (see below), whose sum is σ = 12051840321180. Its totient is φ = 12050602291456.

The previous prime is 12051221306287. The next prime is 12051221306321. The reversal of 12051221306317 is 71360312215021.

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 1245235041801 + 10805986264516 = 1115901^2 + 3287246^2 .

It is a cyclic number.

It is not a de Polignac number, because 12051221306317 - 2²⁷ = 12051087088589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051221306017) 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, 309478228 + ... + 309517165.

It is an arithmetic number, because the mean of its divisors is an integer number (3012960080295).

Almost surely, 2^{12051221306317} is an apocalyptic number.

It is an amenable number.

12051221306317 is a deficient number, since it is larger than the sum of its proper divisors (619014863).

12051221306317 is an equidigital number, since it uses as much as digits as its factorization.

12051221306317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619014862.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 12051221306317 in words is "twelve trillion, fifty-one billion, two hundred twenty-one million, three hundred six thousand, three hundred seventeen".