Yotta-

Yotta- is an SI prefix meaning one septillion.SI brochure, Section 3.1 on BIPM site The name is a modification of the Latin "octo" meaning eight. Until November 18, 2022, it was the largest official SI prefix, and with the international system of units amassing great popularity through the internet, a multitude of unofficial extensions to the original system were created by different people to compensate for the lack of prefixes denoting scales beyond one septillion. See Prefix 1027. 
The reciprocal of this prefix is yocto-. The name is a combination of the letter Y and the Latin "octo".
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Category:Prefixes
Category:SI prefixes