111111221118 has 16 divisors (see below), whose sum is σ = 222303845376. Its totient is φ = 37023506520.

The previous prime is 111111221083. The next prime is 111111221119. The reversal of 111111221118 is 811122111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111221094 and 111111221103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111221119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3374046 + ... + 3406817.

It is an arithmetic number, because the mean of its divisors is an integer number (13893990336).

Almost surely, 2^111111221118 is an apocalyptic number.

111111221118 is an abundant number, since it is smaller than the sum of its proper divisors (111192624258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111221118 is a wasteful number, since it uses less digits than its factorization.

111111221118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783599.

The product of its digits is 32, while the sum is 21.

Adding to 111111221118 its reverse (811122111111), we get a palindrome (922233332229).

The spelling of 111111221118 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eighteen".