12120030121 has 2 divisors, whose sum is σ = 12120030122. Its totient is φ = 12120030120.

The previous prime is 12120030073. The next prime is 12120030149. The reversal of 12120030121 is 12103002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10253790121 + 1866240000 = 101261^2 + 43200^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120030121 - 2⁹ = 12120029609 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120030161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060015060 + 6060015061.

It is an arithmetic number, because the mean of its divisors is an integer number (6060015061).

Almost surely, 2^12120030121 is an apocalyptic number.

It is an amenable number.

12120030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120030121 is an equidigital number, since it uses as much as digits as its factorization.

12120030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12120030121 its reverse (12103002121), we get a palindrome (24223032242).

It can be divided in two parts, 121200 and 30121, that added together give a square (151321 = 389²).

The spelling of 12120030121 in words is "twelve billion, one hundred twenty million, thirty thousand, one hundred twenty-one".