12965681832121 has 8 divisors (see below), whose sum is σ = 13126437015560. Its totient is φ = 12805686721152.

The previous prime is 12965681832119. The next prime is 12965681832143. The reversal of 12965681832121 is 12123818656921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 409600 + 12965681422521 = 640^2 + 3600789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12965681832121 - 2¹ = 12965681832119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12965681832161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189983790 + ... + 190052023.

It is an arithmetic number, because the mean of its divisors is an integer number (1640804626945).

Almost surely, 2^{12965681832121} is an apocalyptic number.

It is an amenable number.

12965681832121 is a deficient number, since it is larger than the sum of its proper divisors (160755183439).

12965681832121 is a wasteful number, since it uses less digits than its factorization.

12965681832121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380036235.

The product of its digits is 2488320, while the sum is 55.

The spelling of 12965681832121 in words is "twelve trillion, nine hundred sixty-five billion, six hundred eighty-one million, eight hundred thirty-two thousand, one hundred twenty-one".