1021001208973 has 2 divisors, whose sum is σ = 1021001208974. Its totient is φ = 1021001208972.

The previous prime is 1021001208971. The next prime is 1021001209031. The reversal of 1021001208973 is 3798021001201.

1021001208973 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., 1004208418404 + 16792790569 = 1002102^2 + 129587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021001208973 - 2¹ = 1021001208971 is a prime.

Together with 1021001208971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021001208971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500604486 + 510500604487.

It is an arithmetic number, because the mean of its divisors is an integer number (510500604487).

Almost surely, 2^{1021001208973} is an apocalyptic number.

It is an amenable number.

1021001208973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021001208973 is an equidigital number, since it uses as much as digits as its factorization.

1021001208973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 1021001208973 in words is "one trillion, twenty-one billion, one million, two hundred eight thousand, nine hundred seventy-three".