8221020009 has 8 divisors (see below), whose sum is σ = 10961819232. Its totient is φ = 5480450400.

The previous prime is 8221019981. The next prime is 8221020011. The reversal of 8221020009 is 9000201228.

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

It is not a de Polignac number, because 8221020009 - 2¹³ = 8221011817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8221020029) 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, 61077 + ... + 142029.

It is an arithmetic number, because the mean of its divisors is an integer number (1370227404).

Almost surely, 2^8221020009 is an apocalyptic number.

It is an amenable number.

8221020009 is a deficient number, since it is larger than the sum of its proper divisors (2740799223).

8221020009 is a wasteful number, since it uses less digits than its factorization.

8221020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114807.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8221020009 is about 90669.8406803497. The cubic root of 8221020009 is about 2018.2512729624.

The spelling of 8221020009 in words is "eight billion, two hundred twenty-one million, twenty thousand, nine".