10021320031321 has 4 divisors (see below), whose sum is σ = 10292166518692. Its totient is φ = 9750473543952.

The previous prime is 10021320031301. The next prime is 10021320031339. The reversal of 10021320031321 is 12313002312001.

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 9421283886921 + 600036144400 = 3069411^2 + 774620^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021320031321 - 2¹⁹ = 10021319507033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10021320031301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135423243630 + ... + 135423243703.

It is an arithmetic number, because the mean of its divisors is an integer number (2573041629673).

Almost surely, 2^{10021320031321} is an apocalyptic number.

It is an amenable number.

10021320031321 is a deficient number, since it is larger than the sum of its proper divisors (270846487371).

10021320031321 is an equidigital number, since it uses as much as digits as its factorization.

10021320031321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270846487370.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 10021320031321 its reverse (12313002312001), we get a palindrome (22334322343322).

The spelling of 10021320031321 in words is "ten trillion, twenty-one billion, three hundred twenty million, thirty-one thousand, three hundred twenty-one".