Ittoqqortoormiit has around 400 inhabitants. The area is very sparsely inhabited. There are no other settlements of over 200 inhabitants for around a thousand kilometres.
The nearest airport is 1 Nerlerit Inaat Airport (CNP IATA). which has flights to Kangerlussuaq and Nuuk, and in summertime to Reykjavik. Between the airport and Ittoqqortoormiit a helicopter transfer is needed.
There are no roads outside settlements in eastern Greenland.
Cruise ships (expensive) come here during the summer.
The town is small enough to just walk around town.
The town's nearest neighbour is the largest national park in the world. Don't venture too far, though, as the likelihood of rescuing you in an emergency drops exponentially the further you get from Ittoqqortoormiit. You need an expedition permit for any visit to the park.
There is mobile phone coverage around Ittoqqortoormiit and Nerlerit Inaat Airport. Greenland is not part of the EU, so roaming prices are much higher than in the EU. See also https://telepost.gl and your telephone operator.