In base twelve, and in base eight, "15" is a prime, and so is its 'reversal' "51".
There are many more prime pairs such as 15 and 51 (base eight or twelve) in an odd-number base than in an even-number base: in an even-number base any prime beginning with an even digit cannot be a prime when it is reversed.
Here (for example) is a list of some primes in base eleven which have prime reversals:
(T stands for ten in base eleven)
|12, 21||16, 61||18, 81||27, 72|
|29, 92||34, 43||3T, T3||49, 94|
|56, 65||67, 76||89, 98||9T, T9|
The pdf version of this page continues the theme, using two-way notation and the DSGB symbols for ten and eleven.