The number 1888081808881 is interesting on several counts.
First, it’s a prime number, evenly divisible only by itself and 1. In base 10, it’s also a palindromic number. It has the same sequence of digits whether read forward or backward. In this case, aside from typographical quirks, the number also reads the same upside down or when viewed in a mirror.
In decimal notation, the sequence of palindromic primes begins with 2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, and so on.