Abstract
In the present paper, we establish a Chen-Ricci inequality for a C-totally real warped product submanifold M-n of Sasakian space forms M2m+1 (epsilon). As Chen-Ricci inequality applications, we found the characterization of the base of the warped product M-n via the first eigenvalue of Laplace-Beltrami operator defined on the warping function and a second-order ordinary differential equation. We find the necessary conditions for a base B of a C-totally real-warped product submanifold to be an isometric to the Euclidean sphere S-p.