The prefix for one trillion is tera- (1 x 1012) for short scale countries, and exa- (1 x 1018) for long scale countries.
One trillionth is written .0000000000001. There are twelve zeros that precede the trillionth place. In contrast, there are twelve zeroes after the one when you write one trillionth (1,000,000,000,000).
The prefix mega has the meaning of 1 million.
The meaning of aero-: 1. In the air aeroplane
i dont know sorry. however, it MUST be 1 or 0 since that combination starts at the trillionth number.
It is 0.000 000 000 001