Trillion

From Wikipedia

In Canadian and U.S. american usage, one trillion equals 1,000,000,000,000, or 10¹², or one million millions. An american trillion equals a european billion.

In Europe, one trillion equals 1,000,000,000,000,000,000, or 10¹⁸, or one million million millions. A European trillion equals an American quintillion.

Britain and Australia traditionally used the European version, but have recently largely switched to the U.S. usage.