321220135422 has 12 divisors (see below), whose sum is σ = 695976960120. Its totient is φ = 107073378468.

The previous prime is 321220135403. The next prime is 321220135427. The reversal of 321220135422 is 224531022123.

321220135422 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 201 + 35 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321220135427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8922781522 + ... + 8922781557.

It is an arithmetic number, because the mean of its divisors is an integer number (57998080010).

Almost surely, 2^321220135422 is an apocalyptic number.

321220135422 is an abundant number, since it is smaller than the sum of its proper divisors (374756824698).

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

321220135422 is a wasteful number, since it uses less digits than its factorization.

321220135422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17845563087 (or 17845563084 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 321220135422 its reverse (224531022123), we get a palindrome (545751157545).

The spelling of 321220135422 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred thirty-five thousand, four hundred twenty-two".