30121221213113 has 2 divisors, whose sum is σ = 30121221213114. Its totient is φ = 30121221213112.

The previous prime is 30121221213067. The next prime is 30121221213143. The reversal of 30121221213113 is 31131212212103.

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., 27581319211264 + 2539902001849 = 5251792^2 + 1593707^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121221213113 - 2¹² = 30121221209017 is a prime.

It is not a weakly prime, because it can be changed into another prime (30121221213143) 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, 15060610606556 + 15060610606557.

It is an arithmetic number, because the mean of its divisors is an integer number (15060610606557).

Almost surely, 2^{30121221213113} is an apocalyptic number.

It is an amenable number.

30121221213113 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121221213113 is an equidigital number, since it uses as much as digits as its factorization.

30121221213113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 30121221213113 its reverse (31131212212103), we get a palindrome (61252433425216).

The spelling of 30121221213113 in words is "thirty trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred thirteen".