The object of this paper is
to provide characterizations for certain rings R having the property that
each cyclic right R-module has a cyclic injective hull.1 Such rings will be
called hypercyclic. Characterizations for left perfect hypercyclic rings and
commutative hypercyclic rings are given in terms of their ideal structure and
self-injectivity. An example of a commutative hypercyclic ring without chain
conditions is given to demonstrate that the characterization obtained is
nontrivial.