12216607056779 has 4 divisors (see below), whose sum is σ = 12216673720776. Its totient is φ = 12216540392784.

The previous prime is 12216607056769. The next prime is 12216607056799. The reversal of 12216607056779 is 97765070661221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12216607056779 - 2³⁶ = 12147887580043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12216607056749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33056354 + ... + 33423879.

It is an arithmetic number, because the mean of its divisors is an integer number (3054168430194).

Almost surely, 2^{12216607056779} is an apocalyptic number.

12216607056779 is a deficient number, since it is larger than the sum of its proper divisors (66663997).

12216607056779 is an equidigital number, since it uses as much as digits as its factorization.

12216607056779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66663996.

The product of its (nonzero) digits is 13335840, while the sum is 59.

The spelling of 12216607056779 in words is "twelve trillion, two hundred sixteen billion, six hundred seven million, fifty-six thousand, seven hundred seventy-nine".