111123 has 6 divisors (see below), whose sum is σ = 160524. Its totient is φ = 74076.

The previous prime is 111121. The next prime is 111127. The reversal of 111123 is 321111.

It is not a de Polignac number, because 111123 - 2¹ = 111121 is a prime.

It is a super-2 number, since 2×111123² = 24696642258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 12347 = 111123 / (1 + 1 + 1 + 1 + 2 + 3).

111123 is a lucky number.

It is a plaindrome in base 10.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (111121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6165 + ... + 6182.

It is an arithmetic number, because the mean of its divisors is an integer number (26754).

2¹¹¹¹²³ is an apocalyptic number.

111123 is a deficient number, since it is larger than the sum of its proper divisors (49401).

111123 is a wasteful number, since it uses less digits than its factorization.

111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353 (or 12350 counting only the distinct ones).

The product of its digits is 6, while the sum is 9.

The square root of 111123 is about 333.3511661897. The cubic root of 111123 is about 48.0767002902.

Adding to 111123 its reverse (321111), we get a palindrome (432234).

The spelling of 111123 in words is "one hundred eleven thousand, one hundred twenty-three", and thus it is an iban number.