321204344012221 has 16 divisors (see below), whose sum is σ = 329198939072640. Its totient is φ = 313217414254080.

The previous prime is 321204344012197. The next prime is 321204344012273. The reversal of 321204344012221 is 122210443402123.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321204344012221 is a prime.

It is a super-2 number, since 2×321204344012221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321204344082221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882929400 + ... + 883293118.

It is an arithmetic number, because the mean of its divisors is an integer number (20574933692040).

Almost surely, 2^{321204344012221} is an apocalyptic number.

It is an amenable number.

321204344012221 is a deficient number, since it is larger than the sum of its proper divisors (7994595060419).

321204344012221 is a wasteful number, since it uses less digits than its factorization.

321204344012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374196.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 321204344012221 its reverse (122210443402123), we get a palindrome (443414787414344).

The spelling of 321204344012221 in words is "three hundred twenty-one trillion, two hundred four billion, three hundred forty-four million, twelve thousand, two hundred twenty-one".