30021231220217 has 2 divisors, whose sum is σ = 30021231220218. Its totient is φ = 30021231220216.

The previous prime is 30021231220129. The next prime is 30021231220249. The reversal of 30021231220217 is 71202213212003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27863237902096 + 2157993318121 = 5278564^2 + 1469011^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021231220217 - 2²⁰ = 30021230171641 is a prime.

It is not a weakly prime, because it can be changed into another prime (30021233220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010615610108 + 15010615610109.

It is an arithmetic number, because the mean of its divisors is an integer number (15010615610109).

Almost surely, 2^{30021231220217} is an apocalyptic number.

It is an amenable number.

30021231220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

30021231220217 is an equidigital number, since it uses as much as digits as its factorization.

30021231220217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 30021231220217 in words is "thirty trillion, twenty-one billion, two hundred thirty-one million, two hundred twenty thousand, two hundred seventeen".