30660446221 has 2 divisors, whose sum is σ = 30660446222. Its totient is φ = 30660446220.

The previous prime is 30660446191. The next prime is 30660446239. The reversal of 30660446221 is 12264406603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21575496996 + 9084949225 = 146886^2 + 95315^2 .

It is a cyclic number.

It is not a de Polignac number, because 30660446221 - 2²³ = 30652057613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30660446291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15330223110 + 15330223111.

It is an arithmetic number, because the mean of its divisors is an integer number (15330223111).

Almost surely, 2^30660446221 is an apocalyptic number.

It is an amenable number.

30660446221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30660446221 is an equidigital number, since it uses as much as digits as its factorization.

30660446221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 30660446221 in words is "thirty billion, six hundred sixty million, four hundred forty-six thousand, two hundred twenty-one".