12165232243 has 16 divisors (see below), whose sum is σ = 13354502400. Its totient is φ = 11044596640.

The previous prime is 12165232223. The next prime is 12165232273. The reversal of 12165232243 is 34223256121.

It is a de Polignac number, because none of the positive numbers 2^k-12165232243 is a prime.

It is a super-2 number, since 2×12165232243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115213 + ... + 193918.

It is an arithmetic number, because the mean of its divisors is an integer number (834656400).

Almost surely, 2^12165232243 is an apocalyptic number.

12165232243 is a deficient number, since it is larger than the sum of its proper divisors (1189270157).

12165232243 is a wasteful number, since it uses less digits than its factorization.

12165232243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309242.

The product of its digits is 17280, while the sum is 31.

Adding to 12165232243 its reverse (34223256121), we get a palindrome (46388488364).

The spelling of 12165232243 in words is "twelve billion, one hundred sixty-five million, two hundred thirty-two thousand, two hundred forty-three".