111222111 has 108 divisors (see below), whose sum is σ = 210873096. Its totient is φ = 51891840.

The previous prime is 111222103. The next prime is 111222119.

111222111 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (111222103) and next prime (111222119).

It is not a de Polignac number, because 111222111 - 2³ = 111222103 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222119) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3005985 + ... + 3006021.

Almost surely, 2^111222111 is an apocalyptic number.

111222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111222111 is a deficient number, since it is larger than the sum of its proper divisors (99650985).

111222111 is a wasteful number, since it uses less digits than its factorization.

111222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 71 counting only the distinct ones).

The product of its digits is 8, while the sum is 12.

The square root of 111222111 is about 10546.1894066056. The cubic root of 111222111 is about 480.9098930310.

It can be divided in two parts, 111 and 222111, that added together give a palindrome (222222).

The spelling of 111222111 in words is "one hundred eleven million, two hundred twenty-two thousand, one hundred eleven".