12111479885779 has 4 divisors (see below), whose sum is σ = 12154276634776. Its totient is φ = 12068683136784.

The previous prime is 12111479885773. The next prime is 12111479885819. The reversal of 12111479885779 is 97758897411121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111479885779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111479885773) 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, 21398374074 + ... + 21398374639.

It is an arithmetic number, because the mean of its divisors is an integer number (3038569158694).

Almost surely, 2^{12111479885779} is an apocalyptic number.

12111479885779 is a deficient number, since it is larger than the sum of its proper divisors (42796748997).

12111479885779 is an equidigital number, since it uses as much as digits as its factorization.

12111479885779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42796748996.

The product of its digits is 71124480, while the sum is 70.

The spelling of 12111479885779 in words is "twelve trillion, one hundred eleven billion, four hundred seventy-nine million, eight hundred eighty-five thousand, seven hundred seventy-nine".