12120236321 has 2 divisors, whose sum is σ = 12120236322. Its totient is φ = 12120236320.

The previous prime is 12120236311. The next prime is 12120236329. The reversal of 12120236321 is 12363202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9510150400 + 2610085921 = 97520^2 + 51089^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120236321 - 2¹⁰ = 12120235297 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120236329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060118160 + 6060118161.

It is an arithmetic number, because the mean of its divisors is an integer number (6060118161).

Almost surely, 2^12120236321 is an apocalyptic number.

It is an amenable number.

12120236321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120236321 is an equidigital number, since it uses as much as digits as its factorization.

12120236321 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 23.

Adding to 12120236321 its reverse (12363202121), we get a palindrome (24483438442).

The spelling of 12120236321 in words is "twelve billion, one hundred twenty million, two hundred thirty-six thousand, three hundred twenty-one".