#866
Prime Palindrome
medium · verified · 28% accepted · 517 likes · top 6%
Description
Given an integer n, return the smallest prime palindrome greater than or equal to n.
An integer is prime if it has exactly two divisors: 1 and itself. Note that 1 is not a prime number.
- For example, 2, 3, 5, 7, 11, and 13 are all primes.
An integer is a palindrome if it reads the same from left to right as it does from right to left.
- For example, 101 and 12321 are palindromes.
The test cases are generated so that the answer always exists and is in the range [2, 2 * 108].
Example 1:
Input: n = 6
Output: 7
Example 2:
Input: n = 8
Output: 11
Example 3:
Input: n = 13
Output: 101
Solution