A **million millions**.

1,000,000 x 1,000,000 = **1,000,000,000,000**

Which is a 1 followed by 12 zeros.

Using **scientific notation**: 1 × 10^{12}

We could also think of it as a **thousand billions**.

Examples:

• the Andromeda Galaxy contains about a trillion stars

• it is about a trillion meters from Earth to Saturn

• there are around 3 trillion trees on Earth

• there are around 3 trillion fish in the ocean

• the human body has around 100 trillion cells (about 90 trillion are bacteria)

The prefix "tera-" means a trillion. Example: a terameter is a trillion meters.

*(In many non-English speaking countries a trillion means a million million million, which is a 1 followed by 18 zeros, or 1 × 10 ^{18})*

Below is a cube made of a

**million**smaller cubes. If each of the small cubes is

**also**worth a million dollars, then the whole cube is worth a trillion dollars.