111221244 has 18 divisors (see below), whose sum is σ = 281142680. Its totient is φ = 37073736.

The previous prime is 111221237. The next prime is 111221249. The reversal of 111221244 is 442122111.

It is a tau number, because it is divible by the number of its divisors (18).

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1544704 + ... + 1544775.

Almost surely, 2^111221244 is an apocalyptic number.

It is an amenable number.

111221244 is an abundant number, since it is smaller than the sum of its proper divisors (169921436).

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

111221244 is a wasteful number, since it uses less digits than its factorization.

111221244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089489 (or 3089484 counting only the distinct ones).

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

The square root of 111221244 is about 10546.1483016313. The cubic root of 111221244 is about 480.9086434295.

Adding to 111221244 its reverse (442122111), we get a palindrome (553343355).

The spelling of 111221244 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred forty-four".