30020331221 has 2 divisors, whose sum is σ = 30020331222. Its totient is φ = 30020331220.

The previous prime is 30020331181. The next prime is 30020331223. The reversal of 30020331221 is 12213302003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22728879121 + 7291452100 = 150761^2 + 85390^2 .

It is a cyclic number.

It is not a de Polignac number, because 30020331221 - 2¹⁸ = 30020069077 is a prime.

Together with 30020331223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30020331221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30020331223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15010165610 + 15010165611.

It is an arithmetic number, because the mean of its divisors is an integer number (15010165611).

Almost surely, 2^30020331221 is an apocalyptic number.

It is an amenable number.

30020331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30020331221 is an equidigital number, since it uses as much as digits as its factorization.

30020331221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30020331221 its reverse (12213302003), we get a palindrome (42233633224).

The spelling of 30020331221 in words is "thirty billion, twenty million, three hundred thirty-one thousand, two hundred twenty-one".