What is the Naming System for Large Numbers?

The short scale system (used in the US, modern UK, and most English-speaking countries) names each new -illion as 1000 times the previous one: million (10^6), billion (10^9), trillion (10^12), quadrillion (10^15), quintillion (10^18), sextillion (10^21), septillion (10^24), octillion (10^27), nonillion (10^30), decillion (10^33). The long scale system (used in many European countries) names each new -illion as 1,000,000 times the previous one: million (10^6), milliard (10^6), billion (10^12), billiard (10^15), trillion (10^18), etc.

What comes after a Trillion?

• Quadrillion (10^15)
• Quintillion (10^18)
• Sextillion (10^21)
• Septillion (10^24)
• Octillion (10^27)
• Nonillion (10^30)
• Decillion (10^33)
• Undecillion (10^36)
• Dodecillion (10^39)
• Tredecillion (10^42)
• Quattuordecillion (10^45)
• Quindecillion (10^48)
• Sextodecillion (10^51)
• Septendecillion (10^54)
• Octodecillion (10^57)
• Novemdecillion (10^60)
• Vigintillion (10^63)

What is the biggest named number?

• Googol: 10^100 (one with 100 zeros after 1)
• Googolplex: 10^(10^100) (one with a googol zeros after 1)
• Centillion: In the short scale, 10^303 (one with 303 zeros)