9983827821021 has 8 divisors (see below), whose sum is σ = 14012389924320. Its totient is φ = 6305575465872.

The previous prime is 9983827820933. The next prime is 9983827821089. The reversal of 9983827821021 is 1201287283899.

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

It is not a de Polignac number, because 9983827821021 - 2¹¹ = 9983827818973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9983827321021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87577436970 + ... + 87577437083.

It is an arithmetic number, because the mean of its divisors is an integer number (1751548740540).

Almost surely, 2^{9983827821021} is an apocalyptic number.

It is an amenable number.

9983827821021 is a deficient number, since it is larger than the sum of its proper divisors (4028562103299).

9983827821021 is a wasteful number, since it uses less digits than its factorization.

9983827821021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175154874075.

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 9983827821021 in words is "nine trillion, nine hundred eighty-three billion, eight hundred twenty-seven million, eight hundred twenty-one thousand, twenty-one".