131717311123 has 4 divisors (see below), whose sum is σ = 131740625448. Its totient is φ = 131693996800.

The previous prime is 131717311111. The next prime is 131717311183. The reversal of 131717311123 is 321113717131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321113717131 = 647 ⋅496311773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131717311123 is a prime.

It is a super-2 number, since 2×131717311123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131717311183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11648686 + ... + 11659987.

It is an arithmetic number, because the mean of its divisors is an integer number (32935156362).

Almost surely, 2^131717311123 is an apocalyptic number.

131717311123 is a deficient number, since it is larger than the sum of its proper divisors (23314325).

131717311123 is an equidigital number, since it uses as much as digits as its factorization.

131717311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23314324.

The product of its digits is 2646, while the sum is 31.

The spelling of 131717311123 in words is "one hundred thirty-one billion, seven hundred seventeen million, three hundred eleven thousand, one hundred twenty-three".