6820871112721 has 8 divisors (see below), whose sum is σ = 7602209290080. Its totient is φ = 6081767431488.

The previous prime is 6820871112703. The next prime is 6820871112733. The reversal of 6820871112721 is 1272111780286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6820871112721 - 2⁵ = 6820871112689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820871112701) 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 in 7 ways as a sum of consecutive naturals, for example, 10558623691 + ... + 10558624336.

It is an arithmetic number, because the mean of its divisors is an integer number (950276161260).

Almost surely, 2^{6820871112721} is an apocalyptic number.

It is an amenable number.

6820871112721 is a deficient number, since it is larger than the sum of its proper divisors (781338177359).

6820871112721 is a wasteful number, since it uses less digits than its factorization.

6820871112721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21117248063.

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 6820871112721 in words is "six trillion, eight hundred twenty billion, eight hundred seventy-one million, one hundred twelve thousand, seven hundred twenty-one".