12665316213 has 24 divisors (see below), whose sum is σ = 19990120800. Its totient is φ = 7663390560.

The previous prime is 12665316203. The next prime is 12665316227. The reversal of 12665316213 is 31261356621.

12665316213 is a `hidden beast` number, since 1 + 2 + 66 + 531 + 62 + 1 + 3 = 666.

It is not a de Polignac number, because 12665316213 - 2¹⁰ = 12665315189 is a prime.

It is a super-2 number, since 2×12665316213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665316203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43663 + ... + 165036.

It is an arithmetic number, because the mean of its divisors is an integer number (832921700).

Almost surely, 2^12665316213 is an apocalyptic number.

It is an amenable number.

12665316213 is a deficient number, since it is larger than the sum of its proper divisors (7324804587).

12665316213 is a wasteful number, since it uses less digits than its factorization.

12665316213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209329 (or 209326 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 12665316213 in words is "twelve billion, six hundred sixty-five million, three hundred sixteen thousand, two hundred thirteen".