How to list all the indexers?

bin/magento indexer:info

Name Description
`catalog_category_product` Category Products
`catalog_product_attribute` Product EAV
`catalog_product_category` Product Categories
`catalog_product_price` Product Price
`cataloginventory_stock` Stock
`catalogrule_product` Catalog Product Rule
`catalogrule_rule` Catalog Rule Product
`catalogsearch_fulltext` Catalog Search
`customer_grid` Customer Grid
`design_config_grid` Design Config Grid

http://devdocs.magento.com/guides/v2.0/config-guide/cli/config-cli-subcommands-index.html#config-cli-subcommands-index-reindex

See also: