11163113521 has 32 divisors (see below), whose sum is σ = 13604129280. Its totient is φ = 8958297600.

The previous prime is 11163113519. The next prime is 11163113537. The reversal of 11163113521 is 12531136111.

11163113521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11163113521 - 2¹ = 11163113519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11163110521) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 872845 + ... + 885541.

It is an arithmetic number, because the mean of its divisors is an integer number (425129040).

Almost surely, 2^11163113521 is an apocalyptic number.

It is an amenable number.

11163113521 is a deficient number, since it is larger than the sum of its proper divisors (2441015759).

11163113521 is a wasteful number, since it uses less digits than its factorization.

11163113521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12865.

The product of its digits is 540, while the sum is 25.

Adding to 11163113521 its reverse (12531136111), we get a palindrome (23694249632).

The spelling of 11163113521 in words is "eleven billion, one hundred sixty-three million, one hundred thirteen thousand, five hundred twenty-one".