30768189121 has 2 divisors, whose sum is σ = 30768189122. Its totient is φ = 30768189120.

The previous prime is 30768189113. The next prime is 30768189187. The reversal of 30768189121 is 12198186703.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26560850625 + 4207338496 = 162975^2 + 64864^2 .

It is an emirp because it is prime and its reverse (12198186703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30768189121 - 2³ = 30768189113 is a prime.

It is not a weakly prime, because it can be changed into another prime (30768189521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15384094560 + 15384094561.

It is an arithmetic number, because the mean of its divisors is an integer number (15384094561).

Almost surely, 2^30768189121 is an apocalyptic number.

It is an amenable number.

30768189121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30768189121 is an equidigital number, since it uses as much as digits as its factorization.

30768189121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 30768189121 in words is "thirty billion, seven hundred sixty-eight million, one hundred eighty-nine thousand, one hundred twenty-one".