111000221 has 4 divisors (see below), whose sum is σ = 111146844. Its totient is φ = 110853600.

The previous prime is 111000217. The next prime is 111000233. The reversal of 111000221 is 122000111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122000111 = 113 ⋅1079647.

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 105288121 = 2390^2 + 10261^2 .

It is a cyclic number.

It is not a de Polignac number, because 111000221 - 2² = 111000217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111000199 and 111000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000521) 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, 72170 + ... + 73691.

It is an arithmetic number, because the mean of its divisors is an integer number (27786711).

Almost surely, 2^111000221 is an apocalyptic number.

It is an amenable number.

111000221 is a deficient number, since it is larger than the sum of its proper divisors (146623).

111000221 is an equidigital number, since it uses as much as digits as its factorization.

111000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146622.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 111000221 is about 10535.6642410434. The cubic root of 111000221 is about 480.5898723201.

Adding to 111000221 its reverse (122000111), we get a palindrome (233000332).

The spelling of 111000221 in words is "one hundred eleven million, two hundred twenty-one", and thus it is an aban number.