202013311321 has 4 divisors (see below), whose sum is σ = 202014465444. Its totient is φ = 202012157200.

The previous prime is 202013311307. The next prime is 202013311387. The reversal of 202013311321 is 123113310202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 170697054025 + 31316257296 = 413155^2 + 176964^2 .

It is a cyclic number.

It is not a de Polignac number, because 202013311321 - 2¹⁵ = 202013278553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202013311391) 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, 254350 + ... + 684631.

It is an arithmetic number, because the mean of its divisors is an integer number (50503616361).

Almost surely, 2^202013311321 is an apocalyptic number.

It is an amenable number.

202013311321 is a deficient number, since it is larger than the sum of its proper divisors (1154123).

202013311321 is an equidigital number, since it uses as much as digits as its factorization.

202013311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154122.

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

Adding to 202013311321 its reverse (123113310202), we get a palindrome (325126621523).

The spelling of 202013311321 in words is "two hundred two billion, thirteen million, three hundred eleven thousand, three hundred twenty-one".