11131223233 has 4 divisors (see below), whose sum is σ = 11987471188. Its totient is φ = 10274975280.

The previous prime is 11131223171. The next prime is 11131223237. The reversal of 11131223233 is 33232213111.

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 3264065424 + 7867157809 = 57132^2 + 88697^2 .

It is a cyclic number.

It is not a de Polignac number, because 11131223233 - 2²⁵ = 11097668801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131223237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428123958 + ... + 428123983.

It is an arithmetic number, because the mean of its divisors is an integer number (2996867797).

Almost surely, 2^11131223233 is an apocalyptic number.

11131223233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11131223233 is a deficient number, since it is larger than the sum of its proper divisors (856247955).

11131223233 is an equidigital number, since it uses as much as digits as its factorization.

11131223233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856247954.

The product of its digits is 648, while the sum is 22.

Adding to 11131223233 its reverse (33232213111), we get a palindrome (44363436344).

The spelling of 11131223233 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirty-three".