111213111111 has 16 divisors (see below), whose sum is σ = 157650748416. Its totient is φ = 69580418336.

The previous prime is 111213111101. The next prime is 111213111133. The reversal of 111213111111 is 111111312111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111213111111 - 2⁶ = 111213111047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111213111101) 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, 15201855 + ... + 15209168.

It is an arithmetic number, because the mean of its divisors is an integer number (9853171776).

Almost surely, 2^111213111111 is an apocalyptic number.

111213111111 is a deficient number, since it is larger than the sum of its proper divisors (46437637305).

111213111111 is a wasteful number, since it uses less digits than its factorization.

111213111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30411102.

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

Adding to 111213111111 its reverse (111111312111), we get a palindrome (222324423222).

The spelling of 111213111111 in words is "one hundred eleven billion, two hundred thirteen million, one hundred eleven thousand, one hundred eleven".