2002313321 has 4 divisors (see below), whose sum is σ = 2002845012. Its totient is φ = 2001781632.

The previous prime is 2002313297. The next prime is 2002313333. The reversal of 2002313321 is 1233132002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1233132002 = 2 ⋅616566001.

It can be written as a sum of positive squares in 2 ways, for example, as 1269853225 + 732460096 = 35635^2 + 27064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002313321 - 2¹⁰ = 2002312297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2002313321.

It is not an unprimeable number, because it can be changed into a prime (2002313821) 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, 260156 + ... + 267741.

It is an arithmetic number, because the mean of its divisors is an integer number (500711253).

Almost surely, 2^2002313321 is an apocalyptic number.

It is an amenable number.

2002313321 is a deficient number, since it is larger than the sum of its proper divisors (531691).

2002313321 is an equidigital number, since it uses as much as digits as its factorization.

2002313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531690.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2002313321 is about 44747.2157904824. The cubic root of 2002313321 is about 1260.4066296965.

Adding to 2002313321 its reverse (1233132002), we get a palindrome (3235445323).

The spelling of 2002313321 in words is "two billion, two million, three hundred thirteen thousand, three hundred twenty-one".