12165723331 has 2 divisors, whose sum is σ = 12165723332. Its totient is φ = 12165723330.

The previous prime is 12165723259. The next prime is 12165723341. The reversal of 12165723331 is 13332756121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12165723331 - 2⁷ = 12165723203 is a prime.

It is a super-2 number, since 2×12165723331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12165723341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082861665 + 6082861666.

It is an arithmetic number, because the mean of its divisors is an integer number (6082861666).

Almost surely, 2^12165723331 is an apocalyptic number.

12165723331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165723331 is an equidigital number, since it uses as much as digits as its factorization.

12165723331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The spelling of 12165723331 in words is "twelve billion, one hundred sixty-five million, seven hundred twenty-three thousand, three hundred thirty-one".