111112222111 has 16 divisors (see below), whose sum is σ = 122438742048. Its totient is φ = 99990352000.

The previous prime is 111112222087. The next prime is 111112222157. The reversal of 111112222111 is 111222211111.

It is not a de Polignac number, because 111112222111 - 2⁵ = 111112222079 is a prime.

It is a Duffinian number.

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 (111112222211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8611581 + ... + 8624473.

It is an arithmetic number, because the mean of its divisors is an integer number (7652421378).

Almost surely, 2^111112222111 is an apocalyptic number.

111112222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111112222111 is a deficient number, since it is larger than the sum of its proper divisors (11326519937).

111112222111 is a wasteful number, since it uses less digits than its factorization.

111112222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20762.

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

Adding to 111112222111 its reverse (111222211111), we get a palindrome (222334433222).

It can be divided in two parts, 11 and 1112222111, that multiplied together give a palindrome (12234443221).

The spelling of 111112222111 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, one hundred eleven".