No quantity called a "googolplexplex" has ever been defined.
There are many numbers such as googolplex, googolplexplex, tricentillion. Any number with more than 100 zeros has more zeros than googol.
about 32,000,000 googolplexplex.
There is one trigent-billion, which is a 1 followed by 183,000 zeros! And of course there is also infinity, though it is not a real number.
There is only one place above it, that is Googolplexplex or googolduplex. It contains a googolplex of zero's. Greater than googolplexplex is only infinity.
12 zeros.12 zeros.12 zeros.12 zeros.