12715683221321 has 4 divisors (see below), whose sum is σ = 12715787188500. Its totient is φ = 12715579254144.

The previous prime is 12715683221291. The next prime is 12715683221357. The reversal of 12715683221321 is 12312238651721.

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 185923953721 + 12529759267600 = 431189^2 + 3539740^2 .

It is a cyclic number.

It is not a de Polignac number, because 12715683221321 - 2²⁶ = 12715616112457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12715685221321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51799916 + ... + 52044813.

It is an arithmetic number, because the mean of its divisors is an integer number (3178946797125).

Almost surely, 2^{12715683221321} is an apocalyptic number.

It is an amenable number.

12715683221321 is a deficient number, since it is larger than the sum of its proper divisors (103967179).

12715683221321 is a wasteful number, since it uses less digits than its factorization.

12715683221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103967178.

The product of its digits is 241920, while the sum is 44.

The spelling of 12715683221321 in words is "twelve trillion, seven hundred fifteen billion, six hundred eighty-three million, two hundred twenty-one thousand, three hundred twenty-one".