111221223 has 16 divisors (see below), whose sum is σ = 155550720. Its totient is φ = 70605216.

The previous prime is 111221221. The next prime is 111221237. The reversal of 111221223 is 322122111.

It is not a de Polignac number, because 111221223 - 2¹ = 111221221 is a prime.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 5443 + ... + 15876.

It is an arithmetic number, because the mean of its divisors is an integer number (9721920).

Almost surely, 2^111221223 is an apocalyptic number.

111221223 is a deficient number, since it is larger than the sum of its proper divisors (44329497).

111221223 is a wasteful number, since it uses less digits than its factorization.

111221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21406.

The product of its digits is 48, while the sum is 15.

The square root of 111221223 is about 10546.1473060071. The cubic root of 111221223 is about 480.9086131622.

Adding to 111221223 its reverse (322122111), we get a palindrome (433343334).

The spelling of 111221223 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-three".