2421320321213 has 4 divisors (see below), whose sum is σ = 2425362592800. Its totient is φ = 2417278049628.

The previous prime is 2421320321207. The next prime is 2421320321237. The reversal of 2421320321213 is 3121230231242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2421320321213 - 2¹⁶ = 2421320255677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421320321263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021134895 + ... + 2021136092.

It is an arithmetic number, because the mean of its divisors is an integer number (606340648200).

Almost surely, 2^{2421320321213} is an apocalyptic number.

It is an amenable number.

2421320321213 is a deficient number, since it is larger than the sum of its proper divisors (4042271587).

2421320321213 is an equidigital number, since it uses as much as digits as its factorization.

2421320321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042271586.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 2421320321213 its reverse (3121230231242), we get a palindrome (5542550552455).

The spelling of 2421320321213 in words is "two trillion, four hundred twenty-one billion, three hundred twenty million, three hundred twenty-one thousand, two hundred thirteen".