Determining the exact number of particles in the universe is an extremely challenging task. The universe is vast and consists of an enormous number of particles, including atoms, subatomic particles, and other entities such as photons and neutrinos. However, estimating the precise number is not currently possible due to the limitations of our knowledge and observational capabilities.
Regarding the existence of intelligent life, as far as our current understanding and observations go, intelligent life appears to be relatively rare in the universe. While there are an estimated 100 billion galaxies in the observable universe, each containing billions or even trillions of stars, the emergence of intelligent life on a planet seems to be a complex and rare occurrence.
While there is no definitive evidence of intelligent life beyond Earth at present, the vastness of the universe suggests that it is possible for intelligent life to exist elsewhere. The search for extraterrestrial intelligence, known as SETI, continues with efforts to detect signals or signs of intelligent life from other star systems. However, until concrete evidence is obtained, the existence of intelligent life beyond our planet remains an open question.