809011221282 has 128 divisors (see below), whose sum is σ = 1997229312000. Its totient is φ = 240667640640.

The previous prime is 809011221269. The next prime is 809011221289. The reversal of 809011221282 is 282122110908.

809011221282 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (809011221289) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26023644 + ... + 26054712.

It is an arithmetic number, because the mean of its divisors is an integer number (15603354000).

Almost surely, 2^809011221282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809011221282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998614656000).

809011221282 is an abundant number, since it is smaller than the sum of its proper divisors (1188218090718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809011221282 is a wasteful number, since it uses less digits than its factorization.

809011221282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31893 (or 31887 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 809011221282 in words is "eight hundred nine billion, eleven million, two hundred twenty-one thousand, two hundred eighty-two".