111221233 has 4 divisors (see below), whose sum is σ = 113933988. Its totient is φ = 108508480.

The previous prime is 111221221. The next prime is 111221237. The reversal of 111221233 is 332122111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38340864 + 72880369 = 6192^2 + 8537^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221233 - 2⁹ = 111220721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356316 + ... + 1356397.

It is an arithmetic number, because the mean of its divisors is an integer number (28483497).

Almost surely, 2^111221233 is an apocalyptic number.

It is an amenable number.

111221233 is a deficient number, since it is larger than the sum of its proper divisors (2712755).

111221233 is an equidigital number, since it uses as much as digits as its factorization.

111221233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712754.

The product of its digits is 72, while the sum is 16.

The square root of 111221233 is about 10546.1477801138. The cubic root of 111221233 is about 480.9086275752.

Adding to 111221233 its reverse (332122111), we get a palindrome (443343344).

The spelling of 111221233 in words is "one hundred eleven million, two hundred twenty-one thousand, two hundred thirty-three".