111123223 has 4 divisors (see below), whose sum is σ = 113707528. Its totient is φ = 108538920.

The previous prime is 111123197. The next prime is 111123253. The reversal of 111123223 is 322321111.

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 111123223 - 2¹³ = 111115031 is a prime.

It is the 10542-nd Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111123197 and 111123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123253) by changing a digit.

It is a nontrivial repunit in base 10541.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292088 + ... + 1292173.

It is an arithmetic number, because the mean of its divisors is an integer number (28426882).

Almost surely, 2^111123223 is an apocalyptic number.

111123223 is a deficient number, since it is larger than the sum of its proper divisors (2584305).

111123223 is an equidigital number, since it uses as much as digits as its factorization.

111123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584304.

The product of its digits is 72, while the sum is 16.

The square root of 111123223 is about 10541.5000355737. The cubic root of 111123223 is about 480.7673245010.

Adding to 111123223 its reverse (322321111), we get a palindrome (433444334).

The spelling of 111123223 in words is "one hundred eleven million, one hundred twenty-three thousand, two hundred twenty-three".