11171121 has 16 divisors (see below), whose sum is σ = 16196544. Its totient is φ = 6807744.

The previous prime is 11171087. The next prime is 11171137. The reversal of 11171121 is 12117111.

11171121 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 11171121 - 2⁹ = 11170609 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 11171121.

It is not an unprimeable number, because it can be changed into a prime (11171621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2835 + ... + 5511.

It is an arithmetic number, because the mean of its divisors is an integer number (1012284).

Almost surely, 2^11171121 is an apocalyptic number.

It is an amenable number.

11171121 is a deficient number, since it is larger than the sum of its proper divisors (5025423).

11171121 is a wasteful number, since it uses less digits than its factorization.

11171121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800.

The product of its digits is 14, while the sum is 15.

The square root of 11171121 is about 3342.3226953722. The cubic root of 11171121 is about 223.5453215999.

Adding to 11171121 its reverse (12117111), we get a palindrome (23288232).

The spelling of 11171121 in words is "eleven million, one hundred seventy-one thousand, one hundred twenty-one".