
    Given a loan identifier number in the bank's transaction monitoring system, develop a function that generates the next valid palindromic identifier number that is greater than the current one, ensuring each loan has a unique, verifiable tracking code. The generated palindromic identifier must be the smallest possible number larger than the input that reads the same forwards and backwards, maintaining the bank's audit trail requirements.
    

    
import sys

def next_smallest_palindrome(num):
    """
    Given a loan identifier number in the bank's transaction monitoring system, develop a function that generates the next valid palindromic identifier number that is greater than the current one, ensuring each loan has a unique, verifiable tracking code. The generated palindromic identifier must be the smallest possible number larger than the input that reads the same forwards and backwards, maintaining the bank's audit trail requirements.
    

    """
import sys

def next_smallest_palindrome(num):
    """
    Given a loan identifier number in the bank's transaction monitoring system, develop a function that generates the next valid palindromic identifier number that is greater than the current one, ensuring each loan has a unique, verifiable tracking code. The generated palindromic identifier must be the smallest possible number larger than the input that reads the same forwards and backwards, maintaining the bank's audit trail requirements.
    

    """
    numstr = str(num)
    for i in range(num + 1, sys.maxsize):
        if str(i) == str(i)[::-1]:
            return i