In a trillion, there are 12 noughts (zeros):
1 trillion = 1,000,000,000,000.

How Many Noughts in a Trillion?

Quick Scoop

If you write one trillion in full, it looks like this:

1,000,000,000,000

Count the digits after the 1:

  • 1,000 (thousand) → 3 noughts
  • 1,000,000 (million) → 6 noughts
  • 1,000,000,000 (billion) → 9 noughts
  • 1,000,000,000,000 (trillion) → 12 noughts

So, a trillion is a 1 followed by twelve noughts.

Mini Breakdown of Big Numbers

Here’s a simple way to see where a trillion fits among other big numbers:

  • Thousand = 1,000 → 3 noughts
  • Million = 1,000,000 → 6 noughts
  • Billion = 1,000,000,000 → 9 noughts
  • Trillion = 1,000,000,000,000 → 12 noughts

In maths notation, a trillion is 101210^{12}1012, which also tells you it has 12 zeros after the 1.

Quick Memory Trick

A handy way to remember:

  1. Group noughts in sets of three (thousands).
  2. Thousand = 1 group (3 zeros).
  3. Million = 2 groups (6 zeros).
  4. Billion = 3 groups (9 zeros).
  5. Trillion = 4 groups (12 zeros).

So you can think of a trillion as four groups of three noughts after the

  1. TL;DR: One trillion has 12 noughts.