2121201322313 has 4 divisors (see below), whose sum is σ = 2121706254228. Its totient is φ = 2120696390400.

The previous prime is 2121201322301. The next prime is 2121201322333. The reversal of 2121201322313 is 3132231021212.

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 476877256969 + 1644324065344 = 690563^2 + 1282312^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121201322313 - 2¹⁴ = 2121201305929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121201322333) 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, 252459656 + ... + 252468057.

It is an arithmetic number, because the mean of its divisors is an integer number (530426563557).

Almost surely, 2^{2121201322313} is an apocalyptic number.

It is an amenable number.

2121201322313 is a deficient number, since it is larger than the sum of its proper divisors (504931915).

2121201322313 is an equidigital number, since it uses as much as digits as its factorization.

2121201322313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504931914.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121201322313 its reverse (3132231021212), we get a palindrome (5253432343525).

The spelling of 2121201322313 in words is "two trillion, one hundred twenty-one billion, two hundred one million, three hundred twenty-two thousand, three hundred thirteen".