321121443122213 has 4 divisors (see below), whose sum is σ = 321145032458028. Its totient is φ = 321097853786400.

The previous prime is 321121443122159. The next prime is 321121443122377. The reversal of 321121443122213 is 312221344121123.

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 100552400766724 + 220569042355489 = 10027582^2 + 14851567^2 .

It is a cyclic number.

It is not a de Polignac number, because 321121443122213 - 2²⁶ = 321121376013349 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 321121443122213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321121443124213) 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, 11794647488 + ... + 11794674713.

It is an arithmetic number, because the mean of its divisors is an integer number (80286258114507).

Almost surely, 2^{321121443122213} is an apocalyptic number.

It is an amenable number.

321121443122213 is a deficient number, since it is larger than the sum of its proper divisors (23589335815).

321121443122213 is a wasteful number, since it uses less digits than its factorization.

321121443122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23589335814.

The product of its digits is 13824, while the sum is 32.

Adding to 321121443122213 its reverse (312221344121123), we get a palindrome (633342787243336).

The spelling of 321121443122213 in words is "three hundred twenty-one trillion, one hundred twenty-one billion, four hundred forty-three million, one hundred twenty-two thousand, two hundred thirteen".