13112311 has 4 divisors (see below), whose sum is σ = 13169800. Its totient is φ = 13054824.

The previous prime is 13112273. The next prime is 13112329. The reversal of 13112311 is 11321131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13112311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112291 and 13112300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28401 + ... + 28858.

It is an arithmetic number, because the mean of its divisors is an integer number (3292450).

Almost surely, 2^13112311 is an apocalyptic number.

13112311 is a deficient number, since it is larger than the sum of its proper divisors (57489).

13112311 is an equidigital number, since it uses as much as digits as its factorization.

13112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57488.

The product of its digits is 18, while the sum is 13.

The square root of 13112311 is about 3621.0925146977. The cubic root of 13112311 is about 235.8086582276.

Adding to 13112311 its reverse (11321131), we get a palindrome (24433442).

The spelling of 13112311 in words is "thirteen million, one hundred twelve thousand, three hundred eleven".