30121203230221 has 2 divisors, whose sum is σ = 30121203230222. Its totient is φ = 30121203230220.

The previous prime is 30121203230203. The next prime is 30121203230249. The reversal of 30121203230221 is 12203230212103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25291695937225 + 4829507292996 = 5029085^2 + 2197614^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121203230221 - 2⁹ = 30121203229709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30121203230192 and 30121203230201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121203260221) 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, 15060601615110 + 15060601615111.

It is an arithmetic number, because the mean of its divisors is an integer number (15060601615111).

Almost surely, 2^{30121203230221} is an apocalyptic number.

It is an amenable number.

30121203230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121203230221 is an equidigital number, since it uses as much as digits as its factorization.

30121203230221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 30121203230221 its reverse (12203230212103), we get a palindrome (42324433442324).

The spelling of 30121203230221 in words is "thirty trillion, one hundred twenty-one billion, two hundred three million, two hundred thirty thousand, two hundred twenty-one".