12166813325113 has 4 divisors (see below), whose sum is σ = 12184784985060. Its totient is φ = 12148841665168.

The previous prime is 12166813325101. The next prime is 12166813325167. The reversal of 12166813325113 is 31152331866121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8818601369769 + 3348211955344 = 2969613^2 + 1829812^2 .

It is a cyclic number.

It is not a de Polignac number, because 12166813325113 - 2¹³ = 12166813316921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12166813325113.

It is not an unprimeable number, because it can be changed into a prime (12166813325213) 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, 8985828958 + ... + 8985830311.

It is an arithmetic number, because the mean of its divisors is an integer number (3046196246265).

Almost surely, 2^{12166813325113} is an apocalyptic number.

It is an amenable number.

12166813325113 is a deficient number, since it is larger than the sum of its proper divisors (17971659947).

12166813325113 is an equidigital number, since it uses as much as digits as its factorization.

12166813325113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17971659946.

The product of its digits is 155520, while the sum is 43.

The spelling of 12166813325113 in words is "twelve trillion, one hundred sixty-six billion, eight hundred thirteen million, three hundred twenty-five thousand, one hundred thirteen".