katrillionaire means an extremely wealthy person. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From katrillion + -aire.
noun
- An extremely wealthy person.“[…] a sort of modern-day Sabrina-esque story where a young woman, Abby (played by the lovely Chloe Eliot), the daughter of a deeply indebted, widowed summer cook in the Hamptons, ends up living happily ever after with a self-made katrillionaire Bill Gates type (but he's handsome, young, and hip) whose life isn't as easy as it sounds, […]”