111222211 has 8 divisors (see below), whose sum is σ = 119523600. Its totient is φ = 103116288.

The previous prime is 111222193. The next prime is 111222229. The reversal of 111222211 is 112222111.

It is an interprime number because it is at equal distance from previous prime (111222193) and next prime (111222229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111222211 - 2⁵ = 111222179 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 111222191 and 111222200.

It is not an unprimeable number, because it can be changed into a prime (111222011) 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 7 ways as a sum of consecutive naturals, for example, 47686 + ... + 49963.

It is an arithmetic number, because the mean of its divisors is an integer number (14940450).

Almost surely, 2^111222211 is an apocalyptic number.

111222211 is a deficient number, since it is larger than the sum of its proper divisors (8301389).

111222211 is an equidigital number, since it uses as much as digits as its factorization.

111222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97733.

The product of its digits is 16, while the sum is 13.

The square root of 111222211 is about 10546.1941476535. The cubic root of 111222211 is about 480.9100371599.

Adding to 111222211 its reverse (112222111), we get a palindrome (223444322).

The spelling of 111222211 in words is "one hundred eleven million, two hundred twenty-two thousand, two hundred eleven".