221210323422 has 256 divisors, whose sum is σ = 540460118016. Its totient is φ = 59586560000.

The previous prime is 221210323421. The next prime is 221210323493. The reversal of 221210323422 is 224323012122.

221210323422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221210323392 and 221210323401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210323421) 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 127 ways as a sum of consecutive naturals, for example, 218370988 + ... + 218372000.

It is an arithmetic number, because the mean of its divisors is an integer number (2111172336).

Almost surely, 2^221210323422 is an apocalyptic number.

221210323422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210323422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270230059008).

221210323422 is an abundant number, since it is smaller than the sum of its proper divisors (319249794594).

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

221210323422 is a wasteful number, since it uses less digits than its factorization.

221210323422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

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

Adding to 221210323422 its reverse (224323012122), we get a palindrome (445533335544).

The spelling of 221210323422 in words is "two hundred twenty-one billion, two hundred ten million, three hundred twenty-three thousand, four hundred twenty-two".