Trilliárd

Trilliárd is a Hungarian term for the large number 10^21, equal to 1 followed by 21 zeros. It is part of the traditional Hungarian system for naming large numbers, which continues the sequence after trillió (10^18) with trilliód (10^21), followed by kvadrillió (10^24) and so on. The name trilliód is formed by adding a suffix to trillió, marking the next step in this naming pattern.

In numeric form, trilliárd = 1,000,000,000,000,000,000,000. In English, the corresponding value is called sextillion in the short-scale system, illustrating how different naming conventions can align at this magnitude. The Hungarian naming tradition blends elements from long- and short-scale practices and is primarily of historical and linguistic interest today.

Usage of the term is relatively rare in everyday language, as numbers of this magnitude arise mainly in theoretical contexts, astronomy, cosmology, or discussions of very large data scales. For practical purposes, scientific notation (10^21) is typically preferred. See also the broader topic of Hungarian numerical naming and the list of large-number terms in Hungarian.