10021000321 has 4 divisors (see below), whose sum is σ = 10158274372. Its totient is φ = 9883726272.

The previous prime is 10021000313. The next prime is 10021000333. The reversal of 10021000321 is 12300012001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7739600625 + 2281399696 = 87975^2 + 47764^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021000321 - 2³ = 10021000313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021000298 and 10021000307.

It is not an unprimeable number, because it can be changed into a prime (10021001321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68636916 + ... + 68637061.

It is an arithmetic number, because the mean of its divisors is an integer number (2539568593).

Almost surely, 2^10021000321 is an apocalyptic number.

It is an amenable number.

10021000321 is a deficient number, since it is larger than the sum of its proper divisors (137274051).

10021000321 is an equidigital number, since it uses as much as digits as its factorization.

10021000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137274050.

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

Adding to 10021000321 its reverse (12300012001), we get a palindrome (22321012322).

The spelling of 10021000321 in words is "ten billion, twenty-one million, three hundred twenty-one", and thus it is an aban number.