Neitherof them is incorrect. conj. 1. Not either; not in either case. Used with the correlative conjunction nor: Neither we nor they want it. She neither called nor We brought neither coffee nor tea. I will neither help you nor go to my room. Neither can also be followed by (one) of + group of two: Neither of them is ready.
Ifyou are a native speaker, go with your gut feeling. Non-native speakers should probably stick to using are except in a phrase with the contracted there + is or here + is, as in Here's the name and number. If you're a native speaker and doubt yourself, I offer the following. Your mileage may vary.
. 146 100 221 337 445 235 8 233
all of them is or are