210321320213 has 4 divisors (see below), whose sum is σ = 210710084748. Its totient is φ = 209932555680.

The previous prime is 210321320203. The next prime is 210321320219. The reversal of 210321320213 is 312023123012.

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 89899827889 + 120421492324 = 299833^2 + 347018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210321320213 is a prime.

It is a super-2 number, since 2×210321320213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210321320219) 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, 194381456 + ... + 194382537.

It is an arithmetic number, because the mean of its divisors is an integer number (52677521187).

Almost surely, 2^210321320213 is an apocalyptic number.

It is an amenable number.

210321320213 is a deficient number, since it is larger than the sum of its proper divisors (388764535).

210321320213 is an equidigital number, since it uses as much as digits as its factorization.

210321320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388764534.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 210321320213 its reverse (312023123012), we get a palindrome (522344443225).

The spelling of 210321320213 in words is "two hundred ten billion, three hundred twenty-one million, three hundred twenty thousand, two hundred thirteen".