12911113 has 4 divisors (see below), whose sum is σ = 13260100. Its totient is φ = 12562128.

The previous prime is 12911099. The next prime is 12911117. The reversal of 12911113 is 31111921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31111921 = 17 ⋅1830113.

It can be written as a sum of positive squares in 2 ways, for example, as 11751184 + 1159929 = 3428^2 + 1077^2 .

It is a cyclic number.

It is not a de Polignac number, because 12911113 - 2⁵ = 12911081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12911117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174438 + ... + 174511.

It is an arithmetic number, because the mean of its divisors is an integer number (3315025).

Almost surely, 2^12911113 is an apocalyptic number.

It is an amenable number.

12911113 is a deficient number, since it is larger than the sum of its proper divisors (348987).

12911113 is an equidigital number, since it uses as much as digits as its factorization.

12911113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348986.

The product of its digits is 54, while the sum is 19.

The square root of 12911113 is about 3593.2037236984. The cubic root of 12911113 is about 234.5963373507.

The spelling of 12911113 in words is "twelve million, nine hundred eleven thousand, one hundred thirteen".