111222321 has 16 divisors (see below), whose sum is σ = 171388800. Its totient is φ = 62840448.

The previous prime is 111222301. The next prime is 111222341. The reversal of 111222321 is 123222111.

It is an interprime number because it is at equal distance from previous prime (111222301) and next prime (111222341).

It is not a de Polignac number, because 111222321 - 2⁷ = 111222193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111222321.

It is not an unprimeable number, because it can be changed into a prime (111222301) 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, 27886 + ... + 31623.

It is an arithmetic number, because the mean of its divisors is an integer number (10711800).

Almost surely, 2^111222321 is an apocalyptic number.

It is an amenable number.

111222321 is a deficient number, since it is larger than the sum of its proper divisors (60166479).

111222321 is an equidigital number, since it uses as much as digits as its factorization.

111222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59608.

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

The square root of 111222321 is about 10546.1993628036. The cubic root of 111222321 is about 480.9101957017.

Adding to 111222321 its reverse (123222111), we get a palindrome (234444432).

The spelling of 111222321 in words is "one hundred eleven million, two hundred twenty-two thousand, three hundred twenty-one".