321220331111204 has 12 divisors (see below), whose sum is σ = 642440662222464. Its totient is φ = 137665856190504.

The previous prime is 321220331111171. The next prime is 321220331111219. The reversal of 321220331111204 is 402111133022123.

321220331111204 is an admirable number.

It is a super-2 number, since 2×321220331111204² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5736077341244 + ... + 5736077341299.

It is an arithmetic number, because the mean of its divisors is an integer number (53536721851872).

Almost surely, 2^{321220331111204} is an apocalyptic number.

It is an amenable number.

321220331111204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321220331111204 is a wasteful number, since it uses less digits than its factorization.

321220331111204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11472154682554 (or 11472154682552 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 321220331111204 its reverse (402111133022123), we get a palindrome (723331464133327).

The spelling of 321220331111204 in words is "three hundred twenty-one trillion, two hundred twenty billion, three hundred thirty-one million, one hundred eleven thousand, two hundred four".