12665431113 has 16 divisors (see below), whose sum is σ = 17348089536. Its totient is φ = 8213313600.

The previous prime is 12665431111. The next prime is 12665431117. The reversal of 12665431113 is 31113456621.

It is a happy number.

12665431113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12665431113 - 2¹ = 12665431111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12665431111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503995 + ... + 528527.

It is an arithmetic number, because the mean of its divisors is an integer number (1084255596).

Almost surely, 2^12665431113 is an apocalyptic number.

It is an amenable number.

12665431113 is a deficient number, since it is larger than the sum of its proper divisors (4682658423).

12665431113 is a wasteful number, since it uses less digits than its factorization.

12665431113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29224.

The product of its digits is 12960, while the sum is 33.

Adding to 12665431113 its reverse (31113456621), we get a palindrome (43778887734).

The spelling of 12665431113 in words is "twelve billion, six hundred sixty-five million, four hundred thirty-one thousand, one hundred thirteen".