30212122009 has 2 divisors, whose sum is σ = 30212122010. Its totient is φ = 30212122008.

The previous prime is 30212122007. The next prime is 30212122013. The reversal of 30212122009 is 90022121203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29751075225 + 461046784 = 172485^2 + 21472^2 .

It is a cyclic number.

It is not a de Polignac number, because 30212122009 - 2¹ = 30212122007 is a prime.

Together with 30212122007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30212122001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106061004 + 15106061005.

It is an arithmetic number, because the mean of its divisors is an integer number (15106061005).

Almost surely, 2^30212122009 is an apocalyptic number.

It is an amenable number.

30212122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212122009 is an equidigital number, since it uses as much as digits as its factorization.

30212122009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 30212122009 in words is "thirty billion, two hundred twelve million, one hundred twenty-two thousand, nine".