12271171 has 4 divisors (see below), whose sum is σ = 13386744. Its totient is φ = 11155600.

The previous prime is 12271159. The next prime is 12271199. The reversal of 12271171 is 17117221.

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

It is a cyclic number.

It is not a de Polignac number, because 12271171 - 2¹⁵ = 12238403 is a prime.

It is a super-2 number, since 2×12271171² = 301163275422482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12271141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557770 + ... + 557791.

It is an arithmetic number, because the mean of its divisors is an integer number (3346686).

Almost surely, 2^12271171 is an apocalyptic number.

12271171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12271171 is a deficient number, since it is larger than the sum of its proper divisors (1115573).

12271171 is a wasteful number, since it uses less digits than its factorization.

12271171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115572.

The product of its digits is 196, while the sum is 22.

The square root of 12271171 is about 3503.0231229611. The cubic root of 12271171 is about 230.6545375563.

Adding to 12271171 its reverse (17117221), we get a palindrome (29388392).

The spelling of 12271171 in words is "twelve million, two hundred seventy-one thousand, one hundred seventy-one".