8221333821309 has 48 divisors (see below), whose sum is σ = 13609426521600. Its totient is φ = 4684858220448.

The previous prime is 8221333821307. The next prime is 8221333821359. The reversal of 8221333821309 is 9031283331228.

8221333821309 is a `hidden beast` number, since 8 + 2 + 2 + 1 + 3 + 338 + 2 + 1 + 309 = 666.

It is not a de Polignac number, because 8221333821309 - 2¹ = 8221333821307 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221333821307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210551742 + ... + 210590784.

It is an arithmetic number, because the mean of its divisors is an integer number (283529719200).

Almost surely, 2^{8221333821309} is an apocalyptic number.

It is an amenable number.

8221333821309 is a deficient number, since it is larger than the sum of its proper divisors (5388092700291).

8221333821309 is a wasteful number, since it uses less digits than its factorization.

8221333821309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48254 (or 48251 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 8221333821309 in words is "eight trillion, two hundred twenty-one billion, three hundred thirty-three million, eight hundred twenty-one thousand, three hundred nine".