Un trilliard, dans les pays utilisant l'échelle longue, représente le nombre 1021 soit 1 000 000 000 000 000 000 000, soit mille trillions. Ce nombre est appelé sextillion dans les pays utilisant l'échelle courte.
Mille trilliard est égal à un quadrillion.
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trilliard — tril|li|ard sb., en, er, erne … Dansk ordbog
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