131320020017 has 2 divisors, whose sum is σ = 131320020018. Its totient is φ = 131320020016.

The previous prime is 131320019953. The next prime is 131320020043. The reversal of 131320020017 is 710020023131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122192892721 + 9127127296 = 349561^2 + 95536^2 .

It is an emirp because it is prime and its reverse (710020023131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131320020017 - 2⁶ = 131320019953 is a prime.

It is not a weakly prime, because it can be changed into another prime (131320020217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660010008 + 65660010009.

It is an arithmetic number, because the mean of its divisors is an integer number (65660010009).

Almost surely, 2^131320020017 is an apocalyptic number.

It is an amenable number.

131320020017 is a deficient number, since it is larger than the sum of its proper divisors (1).

131320020017 is an equidigital number, since it uses as much as digits as its factorization.

131320020017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 131320020017 its reverse (710020023131), we get a palindrome (841340043148).

The spelling of 131320020017 in words is "one hundred thirty-one billion, three hundred twenty million, twenty thousand, seventeen".