111223111 has 4 divisors (see below), whose sum is σ = 111267424. Its totient is φ = 111178800.

The previous prime is 111223109. The next prime is 111223121. The reversal of 111223111 is 111322111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111223111 - 2¹ = 111223109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111223091 and 111223100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111223121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18150 + ... + 23491.

It is an arithmetic number, because the mean of its divisors is an integer number (27816856).

Almost surely, 2^111223111 is an apocalyptic number.

111223111 is a deficient number, since it is larger than the sum of its proper divisors (44313).

111223111 is an equidigital number, since it uses as much as digits as its factorization.

111223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44312.

The product of its digits is 12, while the sum is 13.

The square root of 111223111 is about 10546.2368169883. The cubic root of 111223111 is about 480.9113343165.

Adding to 111223111 its reverse (111322111), we get a palindrome (222545222).

The spelling of 111223111 in words is "one hundred eleven million, two hundred twenty-three thousand, one hundred eleven".