11 is terrible for a numeric base, because it's prime. It doesn't evenly divide into anything until 121. 12 is nice because it's a highly composite number. 6 is

11 is terrible for a numeric base, because it's prime. It doesn't evenly divide into anything until 121. 12 is nice because it's a highly composite number. 6 is as well, but kinda on the small side, and the extra 2 in 12 relative to 6 would be nice.