304212222121 has 2 divisors, whose sum is σ = 304212222122. Its totient is φ = 304212222120.

The previous prime is 304212222089. The next prime is 304212222203. The reversal of 304212222121 is 121222212403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299002269721 + 5209952400 = 546811^2 + 72180^2 .

It is an emirp because it is prime and its reverse (121222212403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304212222121 - 2⁵ = 304212222089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 304212222092 and 304212222101.

It is not a weakly prime, because it can be changed into another prime (304212228121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152106111060 + 152106111061.

It is an arithmetic number, because the mean of its divisors is an integer number (152106111061).

Almost surely, 2^304212222121 is an apocalyptic number.

It is an amenable number.

304212222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

304212222121 is an equidigital number, since it uses as much as digits as its factorization.

304212222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 304212222121 its reverse (121222212403), we get a palindrome (425434434524).

The spelling of 304212222121 in words is "three hundred four billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".