12166204205 has 4 divisors (see below), whose sum is σ = 14599445052. Its totient is φ = 9732963360.

The previous prime is 12166204157. The next prime is 12166204217. The reversal of 12166204205 is 50240266121.

12166204205 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 an emirpimes, since its reverse is a distinct semiprime: 50240266121 = 2927 ⋅17164423.

It can be written as a sum of positive squares in 2 ways, for example, as 1808460676 + 10357743529 = 42526^2 + 101773^2 .

It is not a de Polignac number, because 12166204205 - 2¹⁴ = 12166187821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1216620416 + ... + 1216620425.

It is an arithmetic number, because the mean of its divisors is an integer number (3649861263).

Almost surely, 2^12166204205 is an apocalyptic number.

It is an amenable number.

12166204205 is a deficient number, since it is larger than the sum of its proper divisors (2433240847).

12166204205 is an equidigital number, since it uses as much as digits as its factorization.

12166204205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433240846.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 12166204205 in words is "twelve billion, one hundred sixty-six million, two hundred four thousand, two hundred five".