Zettillion

Zettillion is equal to \(10^{3 \times 10^{3 \times 10^{21}}+3}\), or \(10^{3 \times 10^{3\text{ sextillion}} + 3}\) using the short scale definition for sextillion.Illion Numbers by Jonathan Bowers The term was coined by Jonathan Bowers.
=== Etymology ===
The name of this number is based on the suffix "-illion" and SI prefix "zetta-".
=== Approximations in other notations ===
Notation 	Approximation
Up-arrow notation 	\(10 \uparrow (3 \times (10 \uparrow (3 \times (10 \uparrow 21)))+3)\) (exact)
Chained arrow notation	\(10 \rightarrow (3 \times (10 \rightarrow (3 \times (10 \uparrow 21)))+3)\) (exact)
Hyper-E notation 	E(3E(3E21)+3) (exact)
H* function 	H(H(H(6)-1)) (exact)
BEAF 	\(\{10,\{3\times \{10,3 \times \{10,21\}\}+3\}\}\) (exact)
Fast-growing Hierarchy	\(f_2^3(67)\)
Scientific notation 	\(10^{3 \times 10^{3 \times 10^{21}}+3}\)
=== Sources ===
=== See also ===
Category: Tier 3 -illion numbers
Category:Numbers
Category:Numbers by Jonathan Bowers
Category:Illion
Category:Class 4