**A palindrome is a number or string that reads the same backward as forward. For example, 121 is a palindrome number because it reads the same from both side.**

```
# Function to check whether a number is a palindrome or not
def palindrome(n):
# Convert the number to a string
num_str = str(n)
# Check whether the string is equal to its reverse
if num_str == num_str[::-1]:
return True
else:
return False
# Example usage
n = 121
if palindrome(n):
print(n, "is a palindrome number")
else:
print(n, "is not a palindrome number")
```

In the program, the `palindrome`

function takes a number `n`

as input and checks whether it is a palindrome or not.

First, the function converts the number to a string using the `str`

function.

Next, it checks whether the string is equal to its reverse string using the slicing operator `[::-1]`

which reverses the string.

Finally, the function returns True if the string is a palindrome, indicating that the number is a palindrome number. If it’s not, the function returns False.

In the example usage, we pass the number 121 to the `palindrome`

function and print a message based on the result.