131201126128717 has 2 divisors, whose sum is σ = 131201126128718. Its totient is φ = 131201126128716.

The previous prime is 131201126128643. The next prime is 131201126128727. The reversal of 131201126128717 is 717821621102131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131054734951396 + 146391177321 = 11447914^2 + 382611^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201126128717 - 2¹¹ = 131201126126669 is a prime.

It is a super-3 number, since 3×131201126128717³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131201126128727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65600563064358 + 65600563064359.

It is an arithmetic number, because the mean of its divisors is an integer number (65600563064359).

Almost surely, 2^{131201126128717} is an apocalyptic number.

It is an amenable number.

131201126128717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131201126128717 is an equidigital number, since it uses as much as digits as its factorization.

131201126128717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 43.

The spelling of 131201126128717 in words is "one hundred thirty-one trillion, two hundred one billion, one hundred twenty-six million, one hundred twenty-eight thousand, seven hundred seventeen".