111211122133 has 4 divisors (see below), whose sum is σ = 111233781580. Its totient is φ = 111188462688.

The previous prime is 111211122079. The next prime is 111211122137. The reversal of 111211122133 is 331221112111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331221112111 = 29 ⋅11421417659.

It can be written as a sum of positive squares in 2 ways, for example, as 96511499569 + 14699622564 = 310663^2 + 121242^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211122133 - 2²⁵ = 111177567701 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 111211122133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211122137) 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, 11322360 + ... + 11332177.

It is an arithmetic number, because the mean of its divisors is an integer number (27808445395).

Almost surely, 2^111211122133 is an apocalyptic number.

It is an amenable number.

111211122133 is a deficient number, since it is larger than the sum of its proper divisors (22659447).

111211122133 is an equidigital number, since it uses as much as digits as its factorization.

111211122133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22659446.

The product of its digits is 72, while the sum is 19.

Adding to 111211122133 its reverse (331221112111), we get a palindrome (442432234244).

The spelling of 111211122133 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, one hundred thirty-three".