801584100021 has 16 divisors (see below), whose sum is σ = 1083294185600. Its totient is φ = 527174526528.

The previous prime is 801584100013. The next prime is 801584100041. The reversal of 801584100021 is 120001485108.

It is a happy number.

It is not a de Polignac number, because 801584100021 - 2³ = 801584100013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801584100001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5277361 + ... + 5427126.

It is an arithmetic number, because the mean of its divisors is an integer number (67705886600).

Almost surely, 2^801584100021 is an apocalyptic number.

It is an amenable number.

801584100021 is a deficient number, since it is larger than the sum of its proper divisors (281710085579).

801584100021 is a wasteful number, since it uses less digits than its factorization.

801584100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704828.

The product of its (nonzero) digits is 2560, while the sum is 30.

Adding to 801584100021 its reverse (120001485108), we get a palindrome (921585585129).

The spelling of 801584100021 in words is "eight hundred one billion, five hundred eighty-four million, one hundred thousand, twenty-one".