8221696021 has 12 divisors (see below), whose sum is σ = 10328082016. Its totient is φ = 6406515720.

The previous prime is 8221696013. The next prime is 8221696033. The reversal of 8221696021 is 1206961228.

It is not a de Polignac number, because 8221696021 - 2³ = 8221696013 is a prime.

It is a super-3 number, since 3×8221696021³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221696051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4852575 + ... + 4854268.

Almost surely, 2^8221696021 is an apocalyptic number.

It is an amenable number.

8221696021 is a deficient number, since it is larger than the sum of its proper divisors (2106385995).

8221696021 is a wasteful number, since it uses less digits than its factorization.

8221696021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9706872 (or 9706861 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 8221696021 is about 90673.5684805666. The cubic root of 8221696021 is about 2018.3065915110.

The spelling of 8221696021 in words is "eight billion, two hundred twenty-one million, six hundred ninety-six thousand, twenty-one".