202321021313 has 4 divisors (see below), whose sum is σ = 202536946500. Its totient is φ = 202105096128.

The previous prime is 202321021303. The next prime is 202321021363. The reversal of 202321021313 is 313120123202.

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 121683764224 + 80637257089 = 348832^2 + 283967^2 .

It is a cyclic number.

It is not a de Polignac number, because 202321021313 - 2⁶ = 202321021249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202321021303) 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, 107961188 + ... + 107963061.

It is an arithmetic number, because the mean of its divisors is an integer number (50634236625).

Almost surely, 2^202321021313 is an apocalyptic number.

It is an amenable number.

202321021313 is a deficient number, since it is larger than the sum of its proper divisors (215925187).

202321021313 is an equidigital number, since it uses as much as digits as its factorization.

202321021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215925186.

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

Adding to 202321021313 its reverse (313120123202), we get a palindrome (515441144515).

The spelling of 202321021313 in words is "two hundred two billion, three hundred twenty-one million, twenty-one thousand, three hundred thirteen".