12251166173 has 2 divisors, whose sum is σ = 12251166174. Its totient is φ = 12251166172.

The previous prime is 12251166167. The next prime is 12251166211. The reversal of 12251166173 is 37166115221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9989402809 + 2261763364 = 99947^2 + 47558^2 .

It is a cyclic number.

It is not a de Polignac number, because 12251166173 - 2⁸ = 12251165917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12251166073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6125583086 + 6125583087.

It is an arithmetic number, because the mean of its divisors is an integer number (6125583087).

Almost surely, 2^12251166173 is an apocalyptic number.

It is an amenable number.

12251166173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12251166173 is an equidigital number, since it uses as much as digits as its factorization.

12251166173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The spelling of 12251166173 in words is "twelve billion, two hundred fifty-one million, one hundred sixty-six thousand, one hundred seventy-three".