12186668121 has 4 divisors (see below), whose sum is σ = 16248890832. Its totient is φ = 8124445412.

The previous prime is 12186668119. The next prime is 12186668129.

12186668121 is nontrivially palindromic in base 10.

12186668121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12186668121 - 2¹ = 12186668119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12186668129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031111351 + ... + 2031111356.

It is an arithmetic number, because the mean of its divisors is an integer number (4062222708).

Almost surely, 2^12186668121 is an apocalyptic number.

It is an amenable number.

12186668121 is a deficient number, since it is larger than the sum of its proper divisors (4062222711).

12186668121 is an equidigital number, since it uses as much as digits as its factorization.

12186668121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062222710.

The product of its digits is 55296, while the sum is 42.

The spelling of 12186668121 in words is "twelve billion, one hundred eighty-six million, six hundred sixty-eight thousand, one hundred twenty-one".