This study systematically investigates the decay properties of superheavy nuclei (SHN) with \(Z = 122\) , focusing on the isotopes \(^{307-311}122\) and their decay products. We calculate \(\alpha \) -decay half-lives ( \(\log _{10} T_{1/2}\) ) using the double folding model (DFM), which incorporates spherical and deformed daughter nuclei shapes, alongside five empirical formulas (VSS, Royer, UNIV, UDL, and mB1). Spontaneous fission (SF) half-lives are compared to identify dominant decay modes. Results reveal that \(^{307}122\) exhibits a three- \(\alpha \) decay chain due to shorter \(\alpha \) -decay half-lives compared to SF. In contrast, \(^{308}122\) and \(^{309}122\) each produce a single \(\alpha \) -chain, while \(^{310}122\) and \(^{311}122\) decay exclusively via SF, as their \(\alpha \) -decay half-lives exceed SF half-lives. Stability against \(\alpha \) -decay peaks near magic or semi-magic nucleon numbers. We explore heavy cluster radioactivity (CR) in \(^{290-322}122\) isotopes and their decay products. For \(^{307-311}122\) , the UDL model identifies modest branching ratios ( \(\log _{10} b_c < 8\) ) indicating cluster emission is less probable than \(\alpha \) -decay, unlike neutron-rich \(^{314-322}122\) , where \(\log _{10} b_c > 8\) . Key factors for probable cluster emissions include magic/semi-magic nucleon numbers in clusters and daughters, and neutron-to-proton ratio of the cluster and its daughter, which, individually or on average, should closely match the \(N/Z\) ratio of the parent isotope. These findings, governed by magic and semi-magic effects together with \(N/Z\) constraints, offer valuable insights into the decay dynamics of \(Z = 122\) and serve as guidance for selecting suitable nuclear pairs in synthesis studies.
