10021020321 has 8 divisors (see below), whose sum is σ = 14389157440. Its totient is φ = 6166781712.

The previous prime is 10021020307. The next prime is 10021020341. The reversal of 10021020321 is 12302012001.

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

It is not a de Polignac number, because 10021020321 - 2⁷ = 10021020193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021020297 and 10021020306.

It is not an unprimeable number, because it can be changed into a prime (10021020341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128474581 + ... + 128474658.

It is an arithmetic number, because the mean of its divisors is an integer number (1798644680).

Almost surely, 2^10021020321 is an apocalyptic number.

It is an amenable number.

10021020321 is a deficient number, since it is larger than the sum of its proper divisors (4368137119).

10021020321 is a wasteful number, since it uses less digits than its factorization.

10021020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256949255.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10021020321 its reverse (12302012001), we get a palindrome (22323032322).

The spelling of 10021020321 in words is "ten billion, twenty-one million, twenty thousand, three hundred twenty-one".