1. A computer-implemented method for managing a sustainable intellectual property (SIP) portfolio of an Enterprise, the computer-implemented method comprises: generating, by a processor, a-sustainable intellectual property (IP) in atomicity of the Enterprise based on a set of sustainability differentiators, wherein the set of sustainability differentiators is obtained, based on at least one of a strength parameter, a spread parameter, a duplicity parameter, and a difference parameter, by: defining at least one of a sustainable claims set and a competitive advantageous claims set for an intellectual property (IP) in atomicity, wherein the sustainable claims set is defined by analyzing the IP in atomicity in comparison with at least one of a pre-existing and a newly formed intellectual property portfolio of the Enterprise (E IP ), and wherein the competitive advantageous claims set is defined by analyzing the IP in atomicity in comparison with at least one of a key player IP (K IP ); obtaining, by the processor, a plurality of decomposed fragments of intellectual property landscapes by analyzing the sustainable IP in atomicity based on a plurality of intermediate datasets and data structures; and creating, by the processor, a sustainable and optimized IP portfolio for the Enterprise by processing at least one of the sustainable IP in atomicity and the plurality of decomposed fragments based on optimization parameters and at least one multiple objective portfolio optimization function, and wherein the optimization parameters includes at least one of a synergy and growth parameter, a valuation parameter, and a risk parameter.