30231321217 has 2 divisors, whose sum is σ = 30231321218. Its totient is φ = 30231321216.

The previous prime is 30231321203. The next prime is 30231321227. The reversal of 30231321217 is 71212313203.

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., 27694285056 + 2537036161 = 166416^2 + 50369^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231321217 - 2⁷ = 30231321089 is a prime.

It is a super-2 number, since 2×30231321217² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30231321191 and 30231321200.

It is not a weakly prime, because it can be changed into another prime (30231321227) 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, 15115660608 + 15115660609.

It is an arithmetic number, because the mean of its divisors is an integer number (15115660609).

Almost surely, 2^30231321217 is an apocalyptic number.

It is an amenable number.

30231321217 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231321217 is an equidigital number, since it uses as much as digits as its factorization.

30231321217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The spelling of 30231321217 in words is "thirty billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred seventeen".