111221224 has 8 divisors (see below), whose sum is σ = 208539810. Its totient is φ = 55610608.

The previous prime is 111221221. The next prime is 111221237. The reversal of 111221224 is 422122111.

It can be written as a sum of positive squares in only one way, i.e., 110628324 + 592900 = 10518^2 + 770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a junction number, because it is equal to n+sod(n) for n = 111221198 and 111221207.

It is not an unprimeable number, because it can be changed into a prime (111221221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6951319 + ... + 6951334.

Almost surely, 2^111221224 is an apocalyptic number.

It is an amenable number.

111221224 is a deficient number, since it is larger than the sum of its proper divisors (97318586).

111221224 is a wasteful number, since it uses less digits than its factorization.

111221224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902659 (or 13902655 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 111221224 is about 10546.1473534177. The cubic root of 111221224 is about 480.9086146035.

Adding to 111221224 its reverse (422122111), we get a palindrome (533343335).

The spelling of 111221224 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-four".