12108132779 has 4 divisors (see below), whose sum is σ = 12116607360. Its totient is φ = 12099658200.

The previous prime is 12108132739. The next prime is 12108132787. The reversal of 12108132779 is 97723180121.

It is a happy number.

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 12108132779 - 2⁸ = 12108132523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12108132709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4235147 + ... + 4238004.

It is an arithmetic number, because the mean of its divisors is an integer number (3029151840).

Almost surely, 2^12108132779 is an apocalyptic number.

12108132779 is a deficient number, since it is larger than the sum of its proper divisors (8474581).

12108132779 is an equidigital number, since it uses as much as digits as its factorization.

12108132779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474580.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 12108132779 in words is "twelve billion, one hundred eight million, one hundred thirty-two thousand, seven hundred seventy-nine".