111221248 has 20 divisors (see below), whose sum is σ = 222226290. Its totient is φ = 55610368.

The previous prime is 111221237. The next prime is 111221249. The reversal of 111221248 is 842122111.

It can be written as a sum of positive squares in only one way, i.e., 110502144 + 719104 = 10512^2 + 848^2 .

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 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 as a sum of consecutive naturals, namely, 108103 + ... + 109126.

Almost surely, 2^111221248 is an apocalyptic number.

It is an amenable number.

111221248 is a deficient number, since it is larger than the sum of its proper divisors (111005042).

111221248 is an frugal number, since it uses more digits than its factorization.

111221248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217247 (or 217231 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 111221248 is about 10546.1484912740. The cubic root of 111221248 is about 480.9086491947.

Adding to 111221248 its reverse (842122111), we get a palindrome (953343359).

The spelling of 111221248 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred forty-eight".