30123012217 has 2 divisors, whose sum is σ = 30123012218. Its totient is φ = 30123012216.

The previous prime is 30123012203. The next prime is 30123012223. The reversal of 30123012217 is 71221032103.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28830681616 + 1292330601 = 169796^2 + 35949^2 .

It is a cyclic number.

It is not a de Polignac number, because 30123012217 - 2⁷ = 30123012089 is a prime.

It is not a weakly prime, because it can be changed into another prime (30123012277) 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, 15061506108 + 15061506109.

It is an arithmetic number, because the mean of its divisors is an integer number (15061506109).

Almost surely, 2^30123012217 is an apocalyptic number.

It is an amenable number.

30123012217 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123012217 is an equidigital number, since it uses as much as digits as its factorization.

30123012217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The spelling of 30123012217 in words is "thirty billion, one hundred twenty-three million, twelve thousand, two hundred seventeen".