10320321213221 has 4 divisors (see below), whose sum is σ = 10320328319712. Its totient is φ = 10320314106732.

The previous prime is 10320321213173. The next prime is 10320321213289. The reversal of 10320321213221 is 12231212302301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10320321213221 - 2²⁶ = 10320254104357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10320321213421) 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, 500825 + ... + 4570718.

It is an arithmetic number, because the mean of its divisors is an integer number (2580082079928).

Almost surely, 2^{10320321213221} is an apocalyptic number.

It is an amenable number.

10320321213221 is a deficient number, since it is larger than the sum of its proper divisors (7106491).

10320321213221 is an equidigital number, since it uses as much as digits as its factorization.

10320321213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106490.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 10320321213221 its reverse (12231212302301), we get a palindrome (22551533515522).

The spelling of 10320321213221 in words is "ten trillion, three hundred twenty billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-one".