30231021217 has 2 divisors, whose sum is σ = 30231021218. Its totient is φ = 30231021216.

The previous prime is 30231021169. The next prime is 30231021241. The reversal of 30231021217 is 71212013203.

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., 26042213376 + 4188807841 = 161376^2 + 64721^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231021217 - 2⁷ = 30231021089 is a prime.

It is a super-2 number, since 2×30231021217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30231021517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115510608 + 15115510609.

It is an arithmetic number, because the mean of its divisors is an integer number (15115510609).

Almost surely, 2^30231021217 is an apocalyptic number.

It is an amenable number.

30231021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231021217 is an equidigital number, since it uses as much as digits as its factorization.

30231021217 is an evil number, because the sum of its binary digits is even.

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

The spelling of 30231021217 in words is "thirty billion, two hundred thirty-one million, twenty-one thousand, two hundred seventeen".