Gkoucholophobia

Gkoucholophobia is the fear of a googol, noted in 3 ways: $$10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000$$, $$10^100$$ and $$1E100$$.