320010001021 has 16 divisors (see below), whose sum is σ = 334169668800. Its totient is φ = 306220134528.

The previous prime is 320010000941. The next prime is 320010001043. The reversal of 320010001021 is 120100010023.

It is a cyclic number.

It is not a de Polignac number, because 320010001021 - 2¹⁹ = 320009476733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320010000989 and 320010001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320010004021) 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 15 ways as a sum of consecutive naturals, for example, 33570 + ... + 800716.

It is an arithmetic number, because the mean of its divisors is an integer number (20885604300).

Almost surely, 2^320010001021 is an apocalyptic number.

It is an amenable number.

320010001021 is a deficient number, since it is larger than the sum of its proper divisors (14159667779).

320010001021 is a wasteful number, since it uses less digits than its factorization.

320010001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767388.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 320010001021 its reverse (120100010023), we get a palindrome (440110011044).

The spelling of 320010001021 in words is "three hundred twenty billion, ten million, one thousand, twenty-one".