111122211111 has 16 divisors (see below), whose sum is σ = 152500391904. Its totient is φ = 71921516544.

The previous prime is 111122211091. The next prime is 111122211121. The reversal of 111122211111 is 111112221111.

It is not a de Polignac number, because 111122211111 - 2²⁹ = 110585340199 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 (111122211121) 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, 1044570 + ... + 1146023.

It is an arithmetic number, because the mean of its divisors is an integer number (9531274494).

Almost surely, 2^111122211111 is an apocalyptic number.

111122211111 is a deficient number, since it is larger than the sum of its proper divisors (41378180793).

111122211111 is a wasteful number, since it uses less digits than its factorization.

111122211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191090.

The product of its digits is 8, while the sum is 15.

Adding to 111122211111 its reverse (111112221111), we get a palindrome (222234432222).

The spelling of 111122211111 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".