11505033011 has 4 divisors (see below), whose sum is σ = 11612556792. Its totient is φ = 11397509232.

The previous prime is 11505032941. The next prime is 11505033017. The reversal of 11505033011 is 11033050511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11505033011 is a prime.

It is a super-2 number, since 2×11505033011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505033017) 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, 53761730 + ... + 53761943.

It is an arithmetic number, because the mean of its divisors is an integer number (2903139198).

Almost surely, 2^11505033011 is an apocalyptic number.

11505033011 is a deficient number, since it is larger than the sum of its proper divisors (107523781).

11505033011 is a wasteful number, since it uses less digits than its factorization.

11505033011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107523780.

The product of its (nonzero) digits is 225, while the sum is 20.

Adding to 11505033011 its reverse (11033050511), we get a palindrome (22538083522).

The spelling of 11505033011 in words is "eleven billion, five hundred five million, thirty-three thousand, eleven".