10021331321 has 8 divisors (see below), whose sum is σ = 10386808200. Its totient is φ = 9657182080.

The previous prime is 10021331317. The next prime is 10021331323. The reversal of 10021331321 is 12313312001.

It can be written as a sum of positive squares in 4 ways, for example, as 68475625 + 9952855696 = 8275^2 + 99764^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10021331321 - 2² = 10021331317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10021331321.

It is not an unprimeable number, because it can be changed into a prime (10021331323) 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, 316526 + ... + 346743.

It is an arithmetic number, because the mean of its divisors is an integer number (1298351025).

Almost surely, 2^10021331321 is an apocalyptic number.

It is an amenable number.

10021331321 is a deficient number, since it is larger than the sum of its proper divisors (365476879).

10021331321 is an equidigital number, since it uses as much as digits as its factorization.

10021331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663819.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 10021331321 its reverse (12313312001), we get a palindrome (22334643322).

The spelling of 10021331321 in words is "ten billion, twenty-one million, three hundred thirty-one thousand, three hundred twenty-one".