13111123 has 4 divisors (see below), whose sum is σ = 13165768. Its totient is φ = 13056480.

The previous prime is 13111117. The next prime is 13111129. The reversal of 13111123 is 32111131.

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

It is an interprime number because it is at equal distance from previous prime (13111117) and next prime (13111129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13111123 is a prime.

It is a super-2 number, since 2×13111123² = 343803092642258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26961 + ... + 27442.

It is an arithmetic number, because the mean of its divisors is an integer number (3291442).

Almost surely, 2^13111123 is an apocalyptic number.

13111123 is a deficient number, since it is larger than the sum of its proper divisors (54645).

13111123 is an equidigital number, since it uses as much as digits as its factorization.

13111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54644.

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

The square root of 13111123 is about 3620.9284720911. The cubic root of 13111123 is about 235.8015364435.

Adding to 13111123 its reverse (32111131), we get a palindrome (45222254).

The spelling of 13111123 in words is "thirteen million, one hundred eleven thousand, one hundred twenty-three".