111111213111 has 16 divisors (see below), whose sum is σ = 153000944640. Its totient is φ = 71650114560.

The previous prime is 111111213091. The next prime is 111111213113. The reversal of 111111213111 is 111312111111.

It is a happy number.

It is not a de Polignac number, because 111111213111 - 2⁵ = 111111213079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111213113) 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, 93066 + ... + 480503.

It is an arithmetic number, because the mean of its divisors is an integer number (9562559040).

Almost surely, 2^111111213111 is an apocalyptic number.

111111213111 is a deficient number, since it is larger than the sum of its proper divisors (41889731529).

111111213111 is a wasteful number, since it uses less digits than its factorization.

111111213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575686.

The product of its digits is 6, while the sum is 15.

Adding to 111111213111 its reverse (111312111111), we get a palindrome (222423324222).

The spelling of 111111213111 in words is "one hundred eleven billion, one hundred eleven million, two hundred thirteen thousand, one hundred eleven".