202120323213 has 4 divisors (see below), whose sum is σ = 269493764288. Its totient is φ = 134746882140.

The previous prime is 202120323191. The next prime is 202120323233. The reversal of 202120323213 is 312323021202.

It is a happy number.

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.

It is not a de Polignac number, because 202120323213 - 2⁶ = 202120323149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202120323213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120323233) 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, 33686720533 + ... + 33686720538.

It is an arithmetic number, because the mean of its divisors is an integer number (67373441072).

Almost surely, 2^202120323213 is an apocalyptic number.

It is an amenable number.

202120323213 is a deficient number, since it is larger than the sum of its proper divisors (67373441075).

202120323213 is an equidigital number, since it uses as much as digits as its factorization.

202120323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67373441074.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 202120323213 its reverse (312323021202), we get a palindrome (514443344415).

The spelling of 202120323213 in words is "two hundred two billion, one hundred twenty million, three hundred twenty-three thousand, two hundred thirteen".