30021210221 has 2 divisors, whose sum is σ = 30021210222. Its totient is φ = 30021210220.

The previous prime is 30021210209. The next prime is 30021210229. The reversal of 30021210221 is 12201212003.

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., 24978222025 + 5042988196 = 158045^2 + 71014^2 .

It is an emirp because it is prime and its reverse (12201212003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30021210221 - 2⁶ = 30021210157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30021210196 and 30021210205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30021210229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010605110 + 15010605111.

It is an arithmetic number, because the mean of its divisors is an integer number (15010605111).

Almost surely, 2^30021210221 is an apocalyptic number.

It is an amenable number.

30021210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30021210221 is an equidigital number, since it uses as much as digits as its factorization.

30021210221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 30021210221 its reverse (12201212003), we get a palindrome (42222422224).

The spelling of 30021210221 in words is "thirty billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".