210243323321 has 8 divisors (see below), whose sum is σ = 226810778184. Its totient is φ = 194142557440.

The previous prime is 210243323317. The next prime is 210243323327. The reversal of 210243323321 is 123323342012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121200763321 + 89042560000 = 348139^2 + 298400^2 .

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 210243323321 - 2² = 210243323317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210243323327) 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, 116671310 + ... + 116673111.

It is an arithmetic number, because the mean of its divisors is an integer number (28351347273).

Almost surely, 2^210243323321 is an apocalyptic number.

It is an amenable number.

210243323321 is a deficient number, since it is larger than the sum of its proper divisors (16567454863).

210243323321 is a wasteful number, since it uses less digits than its factorization.

210243323321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233344491.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 210243323321 its reverse (123323342012), we get a palindrome (333566665333).

The spelling of 210243323321 in words is "two hundred ten billion, two hundred forty-three million, three hundred twenty-three thousand, three hundred twenty-one".