11171213 has 4 divisors (see below), whose sum is σ = 11204700. Its totient is φ = 11137728.

The previous prime is 11171207. The next prime is 11171239. The reversal of 11171213 is 31217111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8219689 + 2951524 = 2867^2 + 1718^2 .

It is a cyclic number.

It is not a de Polignac number, because 11171213 - 2¹⁸ = 10909069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11171191 and 11171200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11171203) 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 3 ways as a sum of consecutive naturals, for example, 16238 + ... + 16911.

It is an arithmetic number, because the mean of its divisors is an integer number (2801175).

Almost surely, 2^11171213 is an apocalyptic number.

It is an amenable number.

11171213 is a deficient number, since it is larger than the sum of its proper divisors (33487).

11171213 is an equidigital number, since it uses as much as digits as its factorization.

11171213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33486.

The product of its digits is 42, while the sum is 17.

The square root of 11171213 is about 3342.3364582280. The cubic root of 11171213 is about 223.5459352690.

Adding to 11171213 its reverse (31217111), we get a palindrome (42388324).

The spelling of 11171213 in words is "eleven million, one hundred seventy-one thousand, two hundred thirteen".