213311322421 has 16 divisors (see below), whose sum is σ = 220157296128. Its totient is φ = 206549481600.

The previous prime is 213311322403. The next prime is 213311322443. The reversal of 213311322421 is 124223113312.

213311322421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311322421 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 (213311322461) 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 15 ways as a sum of consecutive naturals, for example, 2885695 + ... + 2958691.

It is an arithmetic number, because the mean of its divisors is an integer number (13759831008).

Almost surely, 2^213311322421 is an apocalyptic number.

It is an amenable number.

213311322421 is a deficient number, since it is larger than the sum of its proper divisors (6845973707).

213311322421 is a wasteful number, since it uses less digits than its factorization.

213311322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73572.

The product of its digits is 1728, while the sum is 25.

Adding to 213311322421 its reverse (124223113312), we get a palindrome (337534435733).

The spelling of 213311322421 in words is "two hundred thirteen billion, three hundred eleven million, three hundred twenty-two thousand, four hundred twenty-one".