2121202332313 has 4 divisors (see below), whose sum is σ = 2121211034548. Its totient is φ = 2121193630080.

The previous prime is 2121202332289. The next prime is 2121202332367. The reversal of 2121202332313 is 3132332021212.

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 1151818339984 + 969383992329 = 1073228^2 + 984573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121202332313 is a prime.

It is a super-2 number, since 2×2121202332313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121202335313) 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, 3974628 + ... + 4476613.

It is an arithmetic number, because the mean of its divisors is an integer number (530302758637).

Almost surely, 2^{2121202332313} is an apocalyptic number.

It is an amenable number.

2121202332313 is a deficient number, since it is larger than the sum of its proper divisors (8702235).

2121202332313 is an equidigital number, since it uses as much as digits as its factorization.

2121202332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8702234.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2121202332313 its reverse (3132332021212), we get a palindrome (5253534353525).

The spelling of 2121202332313 in words is "two trillion, one hundred twenty-one billion, two hundred two million, three hundred thirty-two thousand, three hundred thirteen".