12118834787 has 4 divisors (see below), whose sum is σ = 12255001560. Its totient is φ = 11982668016.

The previous prime is 12118834769. The next prime is 12118834789. The reversal of 12118834787 is 78743881121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78743881121 = 5791 ⋅13597631.

It is a cyclic number.

It is not a de Polignac number, because 12118834787 - 2⁸ = 12118834531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12118834789) 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, 68083253 + ... + 68083430.

It is an arithmetic number, because the mean of its divisors is an integer number (3063750390).

Almost surely, 2^12118834787 is an apocalyptic number.

12118834787 is a deficient number, since it is larger than the sum of its proper divisors (136166773).

12118834787 is an equidigital number, since it uses as much as digits as its factorization.

12118834787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136166772.

The product of its digits is 602112, while the sum is 50.

The spelling of 12118834787 in words is "twelve billion, one hundred eighteen million, eight hundred thirty-four thousand, seven hundred eighty-seven".