12165442169 has 2 divisors, whose sum is σ = 12165442170. Its totient is φ = 12165442168.

The previous prime is 12165442057. The next prime is 12165442171. The reversal of 12165442169 is 96124456121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11238544144 + 926898025 = 106012^2 + 30445^2 .

It is a cyclic number.

It is not a de Polignac number, because 12165442169 - 2³² = 7870474873 is a prime.

It is a super-2 number, since 2×12165442169² (a number of 21 digits) contains 22 as substring.

Together with 12165442171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12165445169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082721084 + 6082721085.

It is an arithmetic number, because the mean of its divisors is an integer number (6082721085).

Almost surely, 2^12165442169 is an apocalyptic number.

It is an amenable number.

12165442169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165442169 is an equidigital number, since it uses as much as digits as its factorization.

12165442169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The spelling of 12165442169 in words is "twelve billion, one hundred sixty-five million, four hundred forty-two thousand, one hundred sixty-nine".