213221203422 has 16 divisors (see below), whose sum is σ = 434488490640. Its totient is φ = 69732720512.

The previous prime is 213221203421. The next prime is 213221203441. The reversal of 213221203422 is 224302122312.

It is a junction number, because it is equal to n+sod(n) for n = 213221203392 and 213221203401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221203421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335253147 + ... + 335253782.

It is an arithmetic number, because the mean of its divisors is an integer number (27155530665).

Almost surely, 2^213221203422 is an apocalyptic number.

213221203422 is an abundant number, since it is smaller than the sum of its proper divisors (221267287218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213221203422 is a wasteful number, since it uses less digits than its factorization.

213221203422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670506987.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 213221203422 its reverse (224302122312), we get a palindrome (437523325734).

The spelling of 213221203422 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred three thousand, four hundred twenty-two".