111321228 has 48 divisors (see below), whose sum is σ = 274400000. Its totient is φ = 35028288.

The previous prime is 111321179. The next prime is 111321229. The reversal of 111321228 is 822123111.

It is a super-3 number, since 3×111321228³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (111321229) 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, 78873 + ... + 80271.

Almost surely, 2^111321228 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 111321228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137200000).

111321228 is an abundant number, since it is smaller than the sum of its proper divisors (163078772).

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

111321228 is a wasteful number, since it uses less digits than its factorization.

111321228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1772 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 111321228 is about 10550.8875456049. The cubic root of 111321228 is about 481.0527069402.

Adding to 111321228 its reverse (822123111), we get a palindrome (933444339).

The spelling of 111321228 in words is "one hundred eleven million, three hundred twenty-one thousand, two hundred twenty-eight".