12111232113 has 12 divisors (see below), whose sum is σ = 17611413300. Its totient is φ = 8019964896.

The previous prime is 12111232109. The next prime is 12111232127. The reversal of 12111232113 is 31123211121.

It can be written as a sum of positive squares in 2 ways, for example, as 4191656049 + 7919576064 = 64743^2 + 88992^2 .

It is not a de Polignac number, because 12111232113 - 2² = 12111232109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111232103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4514406 + ... + 4517087.

It is an arithmetic number, because the mean of its divisors is an integer number (1467617775).

Almost surely, 2^12111232113 is an apocalyptic number.

It is an amenable number.

12111232113 is a deficient number, since it is larger than the sum of its proper divisors (5500181187).

12111232113 is a wasteful number, since it uses less digits than its factorization.

12111232113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031648 (or 9031645 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12111232113 its reverse (31123211121), we get a palindrome (43234443234).

The spelling of 12111232113 in words is "twelve billion, one hundred eleven million, two hundred thirty-two thousand, one hundred thirteen".