304312212221 has 8 divisors (see below), whose sum is σ = 304784907840. Its totient is φ = 303839850112.

The previous prime is 304312212187. The next prime is 304312212223. The reversal of 304312212221 is 122212213403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 304312212221 - 2³⁰ = 303238470397 is a prime.

It is a super-3 number, since 3×304312212221³ (a number of 35 digits) contains 333 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 (304312212223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774946 + ... + 1938828.

It is an arithmetic number, because the mean of its divisors is an integer number (38098113480).

Almost surely, 2^304312212221 is an apocalyptic number.

It is an amenable number.

304312212221 is a deficient number, since it is larger than the sum of its proper divisors (472695619).

304312212221 is a wasteful number, since it uses less digits than its factorization.

304312212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166755.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 304312212221 its reverse (122212213403), we get a palindrome (426524425624).

The spelling of 304312212221 in words is "three hundred four billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty-one".