11105521 has 16 divisors (see below), whose sum is σ = 13242240. Its totient is φ = 9112320.

The previous prime is 11105473. The next prime is 11105531. The reversal of 11105521 is 12550111.

It is not a de Polignac number, because 11105521 - 2⁹ = 11105009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11105495 and 11105504.

It is not an unprimeable number, because it can be changed into a prime (11105531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45961 + ... + 46201.

It is an arithmetic number, because the mean of its divisors is an integer number (827640).

Almost surely, 2^11105521 is an apocalyptic number.

It is an amenable number.

11105521 is a deficient number, since it is larger than the sum of its proper divisors (2136719).

11105521 is a wasteful number, since it uses less digits than its factorization.

11105521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 11105521 is about 3332.4947111736. The cubic root of 11105521 is about 223.1068883708.

Adding to 11105521 its reverse (12550111), we get a palindrome (23655632).

The spelling of 11105521 in words is "eleven million, one hundred five thousand, five hundred twenty-one".