Palindromic numbers

Palindrome derived from the Greek word “palindromus” which literally mean “to run back again “can be in word or numerical. A Palindrome is a word, sentence, phrase, and letters and so on, that reads the same from left or right. Examples are Abba, Bob, nun, noon, refer, dad, mum, level, rear, did, civic, dud, eke, deed, and so on.

Numeral palindrome or Palindromic numbers are numbers that remains unchanged when their respective digit are reversed, i.e A positive integer is said to be a (decadic) palindromic number or, shortly, a palindrome if its leftmost digit is the same as its rightmost digit, its second digit from the left is equal to its second digit from the right, and so on.

For Example, 1001, 1111, 1221, 121, 1234321, 16461 etc.

Some palindromic primes are 2, 3, 5, 7, 11, 101, 131, 151, ...

Some palindromic square numbers are 0, 1, 4, 9, 121, 484, 676, 10201, 12321, ...