The question cannot be answered because there is no arithmetic operator between the first string of nines and the second.
9999999999999999999999999999999999 = 10,000,000,000,000,000,000,000,000,000,000,000
1.o-1025
a gaboniontolfon
99999999999999999999
99999999999999999999
just a guess 99999999999999999999999999999999
99999999999999999999 years old
One hundred quintillion.
99999999999999999999 days
99999999999999999999
99999999999999999999
100,000,000,000,000,000,000 {a 1 with 20 zeros}, or 100 quintillion.