12302282666521 has 3 divisors (see below), whose sum is σ = 12302286173983. Its totient is φ = 12302279159060.

The previous prime is 12302282666503. The next prime is 12302282666561. The reversal of 12302282666521 is 12566628220321.

The square root of 12302282666521 is 3507461.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9270435578121 + 3031847088400 = 3044739^2 + 1741220^2 .

It is not a de Polignac number, because 12302282666521 - 2¹⁷ = 12302282535449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12302282666561) 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 in 2 ways as a sum of consecutive naturals, for example, 1753731 + ... + 5261191.

Almost surely, 2^{12302282666521} is an apocalyptic number.

12302282666521 is the 3507461-st square number.

12302282666521 is the 1753731-st centered octagonal number.

It is an amenable number.

12302282666521 is a deficient number, since it is larger than the sum of its proper divisors (3507462).

12302282666521 is an frugal number, since it uses more digits than its factorization.

12302282666521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014922 (or 3507461 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 12302282666521 in words is "twelve trillion, three hundred two billion, two hundred eighty-two million, six hundred sixty-six thousand, five hundred twenty-one".