11131331033 has 4 divisors (see below), whose sum is σ = 11131549668. Its totient is φ = 11131112400.

The previous prime is 11131331021. The next prime is 11131331047. The reversal of 11131331033 is 33013313111.

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 8642119369 + 2489211664 = 92963^2 + 49892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131331033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131330996 and 11131331014.

It is not an unprimeable number, because it can be changed into a prime (11131331633) 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, 11735 + ... + 149667.

It is an arithmetic number, because the mean of its divisors is an integer number (2782887417).

Almost surely, 2^11131331033 is an apocalyptic number.

It is an amenable number.

11131331033 is a deficient number, since it is larger than the sum of its proper divisors (218635).

11131331033 is an equidigital number, since it uses as much as digits as its factorization.

11131331033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218634.

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 11131331033 its reverse (33013313111), we get a palindrome (44144644144).

The spelling of 11131331033 in words is "eleven billion, one hundred thirty-one million, three hundred thirty-one thousand, thirty-three".