"numerous benefits" is correct and usable in written English. You can use it to describe an advantage of something that has many good results. For example: "The bike commuting movement has numerous benefits, such as reducing environmental impact and providing exercise.".
Numerous benefits accrue from values-first leadership.
Reducing chronic undernutrition has numerous benefits.
Hybrid courts offer numerous benefits to national justice systems.
It has numerous benefits for kids in school.
Federal recognition brings numerous benefits, including the possibility of casino gambling.
Universities have reaped numerous benefits by investing their endowments (news article, Nov. 19).
Our history clearly demonstrates that our customers and communities will see numerous benefits from this acquisition.
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia