1017385280821 has 64 divisors (see below), whose sum is σ = 1292903055360. Its totient is φ = 779287703040.

The previous prime is 1017385280773. The next prime is 1017385280833. The reversal of 1017385280821 is 1280825837101.

It is not a de Polignac number, because 1017385280821 - 2²⁵ = 1017351726389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1017385280861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93409786 + ... + 93420676.

It is an arithmetic number, because the mean of its divisors is an integer number (20201610240).

Almost surely, 2^{1017385280821} is an apocalyptic number.

It is an amenable number.

1017385280821 is a deficient number, since it is larger than the sum of its proper divisors (275517774539).

1017385280821 is a wasteful number, since it uses less digits than its factorization.

1017385280821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11234.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 1017385280821 in words is "one trillion, seventeen billion, three hundred eighty-five million, two hundred eighty thousand, eight hundred twenty-one".