111123144 has 64 divisors (see below), whose sum is σ = 336744000. Its totient is φ = 33672960.

The previous prime is 111123121. The next prime is 111123149. The reversal of 111123144 is 441321111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (111123149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21009 + ... + 25760.

It is an arithmetic number, because the mean of its divisors is an integer number (5261625).

Almost surely, 2^111123144 is an apocalyptic number.

It is an amenable number.

111123144 is an abundant number, since it is smaller than the sum of its proper divisors (225620856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111123144 is a wasteful number, since it uses less digits than its factorization.

111123144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46795 (or 46785 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 111123144 is about 10541.4962884782. The cubic root of 111123144 is about 480.7672105715.

Adding to 111123144 its reverse (441321111), we get a palindrome (552444255).

The spelling of 111123144 in words is "one hundred eleven million, one hundred twenty-three thousand, one hundred forty-four".