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The trillillion is equal to 109,003.[1]

In another source, trillillion is equal to 103,000,000,003.[2]

## ApproximationsEdit

For 109003:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{9\,003}$$
Arrow notation $$10\uparrow9\,003$$
Steinhaus-Moser Notation 2632[3] 2633[3]
Copy notation 9[9003] 10[4502]
Taro's multivariable Ackermann function A(3,29904) A(3,29905)
Pound-Star Notation #*((7630))*49 #*((7631))*49
BEAF {10,9003}
Hyper-E notation E9,003
Bashicu matrix system (0)(1)[12] (0)(1)[13]
Hyperfactorial array notation 2,963! 2,964!
Fast-growing hierarchy $$f_2(29\,892)$$ $$f_2(29\,893)$$
Hardy hierarchy $$H_{\omega^2}(29\,892)$$ $$H_{\omega^2}(29\,893)$$
Slow-growing hierarchy $$g_{\omega^{\omega^39+3}}(10)$$

For 103,000,000,003:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{3\,000\,000\,003}$$
Arrow notation $$10\uparrow3\,000\,000\,003$$
Down-arrow notation $$1000\downarrow\downarrow4$$ $$15\downarrow\downarrow9$$
Steinhaus-Moser Notation 8[3][3] 9[3][3]
Copy notation 2[2[10]] 3[3[10]]
H* function H(H(2))
Taro's multivariable Ackermann function A(3,A(3,30)) A(3,A(3,31))
Pound-Star Notation #*((1))*18396 #*((1))*18397
BEAF {10,3000000003}
Hyper-E notation E3,000,000,003
Bashicu matrix system (0)(1)[29] (0)(1)[30]
Hyperfactorial array notation (11!)! (12!)!
Fast-growing hierarchy $$f_2(f_2(28))$$ $$f_2(f_2(29))$$
Hardy hierarchy $$H_{\omega^22}(28)$$ $$H_{\omega^22}(29)$$
Slow-growing hierarchy $$g_{\omega^{\omega^93+3}}(10)$$