213203110321 has 4 divisors (see below), whose sum is σ = 214134128500. Its totient is φ = 212272092144.

The previous prime is 213203110313. The next prime is 213203110349. The reversal of 213203110321 is 123011302312.

213203110321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 129283393600 + 83919716721 = 359560^2 + 289689^2 .

It is a cyclic number.

It is not a de Polignac number, because 213203110321 - 2³ = 213203110313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213206110321) 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, 465508746 + ... + 465509203.

It is an arithmetic number, because the mean of its divisors is an integer number (53533532125).

Almost surely, 2^213203110321 is an apocalyptic number.

It is an amenable number.

213203110321 is a deficient number, since it is larger than the sum of its proper divisors (931018179).

213203110321 is an equidigital number, since it uses as much as digits as its factorization.

213203110321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931018178.

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

Adding to 213203110321 its reverse (123011302312), we get a palindrome (336214412633).

The spelling of 213203110321 in words is "two hundred thirteen billion, two hundred three million, one hundred ten thousand, three hundred twenty-one".