131305163216123 has 4 divisors (see below), whose sum is σ = 141405560386608. Its totient is φ = 121204766045640.

The previous prime is 131305163216089. The next prime is 131305163216191. The reversal of 131305163216123 is 321612361503131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131305163216123 - 2²⁰ = 131305162167547 is a prime.

It is a super-2 number, since 2×131305163216123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131305163276123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050198585223 + ... + 5050198585248.

It is an arithmetic number, because the mean of its divisors is an integer number (35351390096652).

Almost surely, 2^{131305163216123} is an apocalyptic number.

131305163216123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131305163216123 is a deficient number, since it is larger than the sum of its proper divisors (10100397170485).

131305163216123 is a wasteful number, since it uses less digits than its factorization.

131305163216123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100397170484.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 131305163216123 in words is "one hundred thirty-one trillion, three hundred five billion, one hundred sixty-three million, two hundred sixteen thousand, one hundred twenty-three".