There is no "initial" value. See this link for a syntax description.

The handle is a system generated int value to uniquely identify the statement. The handle is not

You can (and should!) use sp_unprepare to free memory if the prepared statement is no longer in use. This may (or may not) lead to a lower number returned as the next handle. The handle value is not bound to a single statment.

Based on your description I'm guessing you're planning to "misuse" a handle id for process or loop control. If that's the case then there might be something wrong with your concept in general...