1021936608817 has 2 divisors, whose sum is σ = 1021936608818. Its totient is φ = 1021936608816.

The previous prime is 1021936608809. The next prime is 1021936608893. The reversal of 1021936608817 is 7188066391201.

1021936608817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 718907277456 + 303029331361 = 847884^2 + 550481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021936608817 - 2³ = 1021936608809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021936308817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510968304408 + 510968304409.

It is an arithmetic number, because the mean of its divisors is an integer number (510968304409).

Almost surely, 2^{1021936608817} is an apocalyptic number.

It is an amenable number.

1021936608817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021936608817 is an equidigital number, since it uses as much as digits as its factorization.

1021936608817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 1021936608817 in words is "one trillion, twenty-one billion, nine hundred thirty-six million, six hundred eight thousand, eight hundred seventeen".