111133121111 has 4 divisors (see below), whose sum is σ = 111146991312. Its totient is φ = 111119250912.

The previous prime is 111133121093. The next prime is 111133121119. The reversal of 111133121111 is 111121331111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111133121111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111133121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111133121119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6923075 + ... + 6939108.

It is an arithmetic number, because the mean of its divisors is an integer number (27786747828).

Almost surely, 2^111133121111 is an apocalyptic number.

111133121111 is a deficient number, since it is larger than the sum of its proper divisors (13870201).

111133121111 is an equidigital number, since it uses as much as digits as its factorization.

111133121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13870200.

The product of its digits is 18, while the sum is 17.

Adding to 111133121111 its reverse (111121331111), we get a palindrome (222254452222).

The spelling of 111133121111 in words is "one hundred eleven billion, one hundred thirty-three million, one hundred twenty-one thousand, one hundred eleven".