Given an integer `x`, return `true` if `x` is palindrome integer.

An integer is a palindrome when it reads the same backward as forward.

- For example, `121` is a palindrome while `123` is not.

Example 1:

    Input: x = 121
    Output: true
    Explanation: 121 reads as 121 from left to right and from right to left.

Example 2:

    Input: x = -121
    Output: false
    Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.

Example 3:

    Input: x = 10
    Output: false
    Explanation: Reads 01 from right to left. Therefore it is not a palindrome.

Constraints:

- `-231 <= x <= 231 - 1`

Follow up: Could you solve it without converting the integer to a string?