111103221 has 4 divisors (see below), whose sum is σ = 148137632. Its totient is φ = 74068812.

The previous prime is 111103207. The next prime is 111103259. The reversal of 111103221 is 122301111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 111103221 - 2¹⁰ = 111102197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111103197 and 111103206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111103261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18517201 + ... + 18517206.

It is an arithmetic number, because the mean of its divisors is an integer number (37034408).

Almost surely, 2^111103221 is an apocalyptic number.

It is an amenable number.

111103221 is a deficient number, since it is larger than the sum of its proper divisors (37034411).

111103221 is an equidigital number, since it uses as much as digits as its factorization.

111103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37034410.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 111103221 is about 10540.5512664187. The cubic root of 111103221 is about 480.7384769904.

Adding to 111103221 its reverse (122301111), we get a palindrome (233404332).

The spelling of 111103221 in words is "one hundred eleven million, one hundred three thousand, two hundred twenty-one".