131121154121355 has 48 divisors (see below), whose sum is σ = 230671481064960. Its totient is φ = 68886747825984.

The previous prime is 131121154121341. The next prime is 131121154121383. The reversal of 131121154121355 is 553121451121131.

131121154121355 is a `hidden beast` number, since 1 + 3 + 11 + 21 + 154 + 121 + 355 = 666.

It is not a de Polignac number, because 131121154121355 - 2⁷ = 131121154121227 is a prime.

It is a super-2 number, since 2×131121154121355² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 344300574 + ... + 344681196.

It is an arithmetic number, because the mean of its divisors is an integer number (4805655855520).

Almost surely, 2^{131121154121355} is an apocalyptic number.

131121154121355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131121154121355 is a deficient number, since it is larger than the sum of its proper divisors (99550326943605).

131121154121355 is a wasteful number, since it uses less digits than its factorization.

131121154121355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494960 (or 494957 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The spelling of 131121154121355 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred fifty-four million, one hundred twenty-one thousand, three hundred fifty-five".