2011111133 has 4 divisors (see below), whose sum is σ = 2018371740. Its totient is φ = 2003850528.

The previous prime is 2011111103. The next prime is 2011111159. The reversal of 2011111133 is 3311111102.

It is a happy number.

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 830707684 + 1180403449 = 28822^2 + 34357^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011111133 - 2⁸ = 2011110877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629888 + ... + 3630441.

It is an arithmetic number, because the mean of its divisors is an integer number (504592935).

Almost surely, 2^2011111133 is an apocalyptic number.

It is an amenable number.

2011111133 is a deficient number, since it is larger than the sum of its proper divisors (7260607).

2011111133 is an equidigital number, since it uses as much as digits as its factorization.

2011111133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260606.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 2011111133 is about 44845.4137342939. The cubic root of 2011111133 is about 1262.2499341732.

Adding to 2011111133 its reverse (3311111102), we get a palindrome (5322222235).

The spelling of 2011111133 in words is "two billion, eleven million, one hundred eleven thousand, one hundred thirty-three".