111311123 has 8 divisors (see below), whose sum is σ = 138777600. Its totient is φ = 86735880.

The previous prime is 111311029. The next prime is 111311131. The reversal of 111311123 is 321113111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111311123 - 2⁸ = 111310867 is a prime.

It is a super-2 number, since 2×111311123² = 24780332207042258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111311098 and 111311107.

It is not an unprimeable number, because it can be changed into a prime (111311623) 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 7 ways as a sum of consecutive naturals, for example, 722723 + ... + 722876.

It is an arithmetic number, because the mean of its divisors is an integer number (17347200).

Almost surely, 2^111311123 is an apocalyptic number.

111311123 is a deficient number, since it is larger than the sum of its proper divisors (27466477).

111311123 is a wasteful number, since it uses less digits than its factorization.

111311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445617.

The product of its digits is 18, while the sum is 14.

The square root of 111311123 is about 10550.4086650708. The cubic root of 111311123 is about 481.0381509123.

Adding to 111311123 its reverse (321113111), we get a palindrome (432424234).

The spelling of 111311123 in words is "one hundred eleven million, three hundred eleven thousand, one hundred twenty-three".