12116423521 has 8 divisors (see below), whose sum is σ = 12233117664. Its totient is φ = 11999793600.

The previous prime is 12116423507. The next prime is 12116423537. The reversal of 12116423521 is 12532461121.

12116423521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12116423521 - 2⁷ = 12116423393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12116423521.

It is not an unprimeable number, because it can be changed into a prime (12116123521) 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 7 ways as a sum of consecutive naturals, for example, 419481 + ... + 447433.

It is an arithmetic number, because the mean of its divisors is an integer number (1529139708).

Almost surely, 2^12116423521 is an apocalyptic number.

It is an amenable number.

12116423521 is a deficient number, since it is larger than the sum of its proper divisors (116694143).

12116423521 is a wasteful number, since it uses less digits than its factorization.

12116423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32111.

The product of its digits is 2880, while the sum is 28.

Adding to 12116423521 its reverse (12532461121), we get a palindrome (24648884642).

The spelling of 12116423521 in words is "twelve billion, one hundred sixteen million, four hundred twenty-three thousand, five hundred twenty-one".