111222144 has 192 divisors, whose sum is σ = 357065280. Its totient is φ = 32947200.

The previous prime is 111222127. The next prime is 111222151. The reversal of 111222144 is 441222111.

It is a tau number, because it is divible by the number of its divisors (192).

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 and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 848959 + ... + 849089.

It is an arithmetic number, because the mean of its divisors is an integer number (1859715).

Almost surely, 2^111222144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111222144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178532640).

111222144 is an abundant number, since it is smaller than the sum of its proper divisors (245843136).

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

111222144 is a wasteful number, since it uses less digits than its factorization.

111222144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 214 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 111222144 is about 10546.1909711516. The cubic root of 111222144 is about 480.9099405936.

Adding to 111222144 its reverse (441222111), we get a palindrome (552444255).

The spelling of 111222144 in words is "one hundred eleven million, two hundred twenty-two thousand, one hundred forty-four".