11111123 has 4 divisors (see below), whose sum is σ = 11382168. Its totient is φ = 10840080.

The previous prime is 11111119. The next prime is 11111131. The reversal of 11111123 is 32111111.

It is a happy number.

11111123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11111123 - 2² = 11111119 is a prime.

It is a super-2 number, since 2×11111123² = 246914108642258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11111173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135461 + ... + 135542.

It is an arithmetic number, because the mean of its divisors is an integer number (2845542).

Almost surely, 2^11111123 is an apocalyptic number.

11111123 is a deficient number, since it is larger than the sum of its proper divisors (271045).

11111123 is an equidigital number, since it uses as much as digits as its factorization.

11111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271044.

The product of its digits is 6, while the sum is 11.

The square root of 11111123 is about 3333.3351166662. The cubic root of 11111123 is about 223.1443962822.

Adding to 11111123 its reverse (32111111), we get a palindrome (43222234).

The spelling of 11111123 in words is "eleven million, one hundred eleven thousand, one hundred twenty-three".