A primo-vigesimo-centillion is equal to 10366 in America, or 10726 in France and Germany. Like most illion numbers, it is part of an extended system of names. It is part of a naming scheme first proposed by Professor Henkle in 1904 and subsequently popularized in 1968 in an article by Dmitri Borgmann. In Henkles scheme the latin ordinals represent their corresponding values, while the cardinals represent multipliers to be applied primarily to the milli- prefix.
Professor Henkles system is notable for being the earliest known attempt to extend the zillion series to the millionth member. It may also have served as the impetus and blue print later systems, including the popular Conway & Guy naming scheme.