1031321067809 has 2 divisors, whose sum is σ = 1031321067810. Its totient is φ = 1031321067808.

The previous prime is 1031321067793. The next prime is 1031321067823. The reversal of 1031321067809 is 9087601231301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603830014225 + 427491053584 = 777065^2 + 653828^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031321067809 - 2⁴ = 1031321067793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031321067859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660533904 + 515660533905.

It is an arithmetic number, because the mean of its divisors is an integer number (515660533905).

Almost surely, 2^{1031321067809} is an apocalyptic number.

It is an amenable number.

1031321067809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031321067809 is an equidigital number, since it uses as much as digits as its factorization.

1031321067809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 1031321067809 in words is "one trillion, thirty-one billion, three hundred twenty-one million, sixty-seven thousand, eight hundred nine".