12115202605 has 16 divisors (see below), whose sum is σ = 16060665600. Its totient is φ = 8699520960.

The previous prime is 12115202599. The next prime is 12115202621. The reversal of 12115202605 is 50620251121.

12115202605 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 12115202605 - 2¹⁷ = 12115071533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12115202605.

It is a congruent number.

It is an unprimeable number.

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, 1389810 + ... + 1398499.

It is an arithmetic number, because the mean of its divisors is an integer number (1003791600).

Almost surely, 2^12115202605 is an apocalyptic number.

It is an amenable number.

12115202605 is a deficient number, since it is larger than the sum of its proper divisors (3945462995).

12115202605 is a wasteful number, since it uses less digits than its factorization.

12115202605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788404.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 12115202605 its reverse (50620251121), we get a palindrome (62735453726).

The spelling of 12115202605 in words is "twelve billion, one hundred fifteen million, two hundred two thousand, six hundred five".