11205331265 has 4 divisors (see below), whose sum is σ = 13446397524. Its totient is φ = 8964265008.

The previous prime is 11205331229. The next prime is 11205331279. The reversal of 11205331265 is 56213350211.

11205331265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56213350211 = 1063 ⋅52881797.

It can be written as a sum of positive squares in 2 ways, for example, as 6972918016 + 4232413249 = 83504^2 + 65057^2 .

It is a cyclic number.

It is not a de Polignac number, because 11205331265 - 2¹² = 11205327169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120533122 + ... + 1120533131.

It is an arithmetic number, because the mean of its divisors is an integer number (3361599381).

Almost surely, 2^11205331265 is an apocalyptic number.

It is an amenable number.

11205331265 is a deficient number, since it is larger than the sum of its proper divisors (2241066259).

11205331265 is an equidigital number, since it uses as much as digits as its factorization.

11205331265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241066258.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 11205331265 its reverse (56213350211), we get a palindrome (67418681476).

The spelling of 11205331265 in words is "eleven billion, two hundred five million, three hundred thirty-one thousand, two hundred sixty-five".