It was the burn address with the most BTC received in 2017 according to http://bitcoinwhoswho.com/blog/2017/12/30/8-97-bitcoins-burned-in-2017/. It's Hash160 is 0000000000000000000000000000000000000000. In Sept 2015 it served as a 40 BTC proof-of-burn address for Blockstore.
So, why did it receive 14,270 inputs of BTC dust in 2017 totaling 8.70069482? Why does "unable to decode output address" accompany this address on every transaction on Blockchain.info? https://blockchain.info/address/1111111111111111111114oLvT2
In this transaction it appears similar to a change address: https://blockchain.info/address/16HBq938GwQkpWKWFkAomt4KpQeWUqXsZR