111111312133 has 4 divisors (see below), whose sum is σ = 111167630028. Its totient is φ = 111054994240.

The previous prime is 111111312127. The next prime is 111111312157. The reversal of 111111312133 is 331213111111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60583915044 + 50527397089 = 246138^2 + 224783^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111312133 - 2¹⁷ = 111111181061 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 111111312133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111312113) 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, 28155988 + ... + 28159933.

It is an arithmetic number, because the mean of its divisors is an integer number (27791907507).

Almost surely, 2^111111312133 is an apocalyptic number.

It is an amenable number.

111111312133 is a deficient number, since it is larger than the sum of its proper divisors (56317895).

111111312133 is an equidigital number, since it uses as much as digits as its factorization.

111111312133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56317894.

The product of its digits is 54, while the sum is 19.

Adding to 111111312133 its reverse (331213111111), we get a palindrome (442324423244).

The spelling of 111111312133 in words is "one hundred eleven billion, one hundred eleven million, three hundred twelve thousand, one hundred thirty-three".