10321313221 has 4 divisors (see below), whose sum is σ = 10321667500. Its totient is φ = 10320958944.

The previous prime is 10321313201. The next prime is 10321313243. The reversal of 10321313221 is 12231312301.

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 3765172321 + 6556140900 = 61361^2 + 80970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10321313221 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 (10321313201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129096 + ... + 193153.

It is an arithmetic number, because the mean of its divisors is an integer number (2580416875).

Almost surely, 2^10321313221 is an apocalyptic number.

It is an amenable number.

10321313221 is a deficient number, since it is larger than the sum of its proper divisors (354279).

10321313221 is an equidigital number, since it uses as much as digits as its factorization.

10321313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354278.

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

Adding to 10321313221 its reverse (12231312301), we get a palindrome (22552625522).

The spelling of 10321313221 in words is "ten billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-one".