11171171 has 4 divisors (see below), whose sum is σ = 12186744. Its totient is φ = 10155600.

The previous prime is 11171137. The next prime is 11171179. The reversal of 11171171 is 17117111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11171171 is a prime.

It is a super-2 number, since 2×11171171² = 249590123022482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11171179) 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, 507770 + ... + 507791.

It is an arithmetic number, because the mean of its divisors is an integer number (3046686).

Almost surely, 2^11171171 is an apocalyptic number.

11171171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11171171 is a deficient number, since it is larger than the sum of its proper divisors (1015573).

11171171 is a wasteful number, since it uses less digits than its factorization.

11171171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015572.

The product of its digits is 49, while the sum is 20.

The square root of 11171171 is about 3342.3301751922. The cubic root of 11171171 is about 223.5456551161.

Adding to 11171171 its reverse (17117111), we get a palindrome (28288282).

It can be divided in two parts, 11 and 171171, that multiplied together give a palindrome (1882881).

The spelling of 11171171 in words is "eleven million, one hundred seventy-one thousand, one hundred seventy-one".