321122212120 has 32 divisors (see below), whose sum is σ = 724155999120. Its totient is φ = 128158925440.

The previous prime is 321122212097. The next prime is 321122212193. The reversal of 321122212120 is 21212221123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9043291 + ... + 9078730.

Almost surely, 2^321122212120 is an apocalyptic number.

It is an amenable number.

321122212120 is an abundant number, since it is smaller than the sum of its proper divisors (403033787000).

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

321122212120 is a wasteful number, since it uses less digits than its factorization.

321122212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18122475 (or 18122471 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 321122212120 its reverse (21212221123), we get a palindrome (342334433243).

The spelling of 321122212120 in words is "three hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty".