11131312033 has 4 divisors (see below), whose sum is σ = 11166426900. Its totient is φ = 11096197168.

The previous prime is 11131312009. The next prime is 11131312039. The reversal of 11131312033 is 33021313111.

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 2759611024 + 8371701009 = 52532^2 + 91497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131312033 is a prime.

It is a super-2 number, since 2×11131312033² (a number of 21 digits) contains 22 as substring.

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 11131312033.

It is not an unprimeable number, because it can be changed into a prime (11131312039) 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, 17556958 + ... + 17557591.

It is an arithmetic number, because the mean of its divisors is an integer number (2791606725).

Almost surely, 2^11131312033 is an apocalyptic number.

It is an amenable number.

11131312033 is a deficient number, since it is larger than the sum of its proper divisors (35114867).

11131312033 is an equidigital number, since it uses as much as digits as its factorization.

11131312033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35114866.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 11131312033 its reverse (33021313111), we get a palindrome (44152625144).

The spelling of 11131312033 in words is "eleven billion, one hundred thirty-one million, three hundred twelve thousand, thirty-three".