🔢 Number one quintillion 🧬 One part in quintillion

quintillionth

9.8

At the position of 1,000,000,000,000,000,000 in a list

adjective
/kwɪnˈtɪljənθ/

: quintillonésimo

She celebrated the quintillionth visitor to her science blog with a special post.

Examples

The computer processed its quintillionth instruction in less than a second.
The astronomer calculated the quintillionth star in the simulation universe.
She finished in quintillionth place in the race.
In a sequence, the quintillionth number is very large.
She celebrated the quintillionth visitor to her science blog with a special post.
In a sequence, the quintillionth number is very large.
The astronomer calculated the quintillionth star in the simulation universe.

Compounds

one-quintillionth

Specialized

9.9

A very tiny part equal to one divided by 1,000,000,000,000,000,000

How High

quintillionth

9.8

billionth

1 4.4

millionth

3 2.1

thousandth

1 2.1

hundredth

14 1.0

tenth

100 1.0

first

∞ 1.0

Surface Forms

quintillionth positive

Morphology

quintillionth = quintillion (transparent) = quintillion + th

Regular ordinal formation: the productive suffix '-th' added to the cardinal noun 'quintillion' yields the ordinal adjective.

Etymology

Quintillionth comes from quint- meaning 'five' and the familiar million, so it names the fifth -illion in the sequence million, billion, trillion, quadrillion, quintillion. So the quintillionth is the position that matches the number one quintillion.