12116516321 has 16 divisors (see below), whose sum is σ = 15026487168. Its totient is φ = 9513504000.

The previous prime is 12116516317. The next prime is 12116516327. The reversal of 12116516321 is 12361561121.

It is not a de Polignac number, because 12116516321 - 2² = 12116516317 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12116516327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496280 + ... + 520121.

It is an arithmetic number, because the mean of its divisors is an integer number (939155448).

Almost surely, 2^12116516321 is an apocalyptic number.

It is an amenable number.

12116516321 is a deficient number, since it is larger than the sum of its proper divisors (2909970847).

12116516321 is a wasteful number, since it uses less digits than its factorization.

12116516321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016552.

The product of its digits is 2160, while the sum is 29.

The spelling of 12116516321 in words is "twelve billion, one hundred sixteen million, five hundred sixteen thousand, three hundred twenty-one".