Sesquadringentillion

A sesquadringentillion is equal to \(10^{1221}\) in the short scale and \(10^{2436}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 406th -illion number.
In the long scale, \(10^{1221}\) is called treducentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1221}\) (exact) 	\(1\times10^{1221}\) (exact)
Arrow notation 	\(10\uparrow 1221\) (exact) 	\(10\uparrow 1221\) (exact)
Steinhaus-Moser Notation 	458[3] 	459[3]
Chained arrow notation 	\(10\rightarrow 1221\) (exact) 	\(10\rightarrow 1221\) (exact)
Taro's multivariable Ackermann function	A(3,4053) 	A(3,4054)
BEAF & Bird's array notation 	{10,1221} (exact) 	{10,1221} (exact)
Hyper-E notation 	E1221 (exact) 	E1221 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(8)\) 	\(s(1)^3(\lambda x.x+1)(9)\)
m(n) map 	m(1)(458) 	m(1)(459)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(4044)\) 	\(f_2(4045)\)
Hardy hierarchy 	\(H_{\omega^2}(4044)\) 	\(H_{\omega^2}(4045)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 2+\omega 2+1}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 2+\omega 2+1}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2436}\) (exact) 	\(1\times10^{2436}\) (exact)
Arrow notation 	\(10\uparrow 2436\) (exact) 	\(10\uparrow 2436\) (exact)
Steinhaus-Moser Notation 	833[3] 	834[3]
Chained arrow notation 	\(10\rightarrow 2436\) (exact) 	\(10\rightarrow 2436\) (exact)
Taro's multivariable Ackermann function	A(3,8089) 	A(3,8090)
BEAF & Bird's array notation 	{10,2436} (exact) 	{10,2436} (exact)
Hyper-E notation 	E2436 (exact) 	E2436 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(9)\) 	\(s(1)^3(\lambda x.x+1)(10)\)
m(n) map 	m(1)(833) 	m(1)(834)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(8079)\) 	\(f_2(8080)\)
Hardy hierarchy 	\(H_{\omega^2}(8079)\) 	\(H_{\omega^2}(8080)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 4+\omega 3+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 4+\omega 3+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Powers of 10 with squarefree exponent
Category:Tier 1 -illion numbers