11505133215311 has 4 divisors (see below), whose sum is σ = 11528189595000. Its totient is φ = 11482076835624.

The previous prime is 11505133215293. The next prime is 11505133215391. The reversal of 11505133215311 is 11351233150511.

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

It is a cyclic number.

It is not a de Polignac number, because 11505133215311 - 2¹⁰ = 11505133214287 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 (11505133215391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11528189096 + ... + 11528190093.

It is an arithmetic number, because the mean of its divisors is an integer number (2882047398750).

Almost surely, 2^{11505133215311} is an apocalyptic number.

11505133215311 is a deficient number, since it is larger than the sum of its proper divisors (23056379689).

11505133215311 is an equidigital number, since it uses as much as digits as its factorization.

11505133215311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23056379688.

The product of its (nonzero) digits is 6750, while the sum is 32.

Adding to 11505133215311 its reverse (11351233150511), we get a palindrome (22856366365822).

The spelling of 11505133215311 in words is "eleven trillion, five hundred five billion, one hundred thirty-three million, two hundred fifteen thousand, three hundred eleven".