12122003305 has 4 divisors (see below), whose sum is σ = 14546403972. Its totient is φ = 9697602640.

The previous prime is 12122003303. The next prime is 12122003389. The reversal of 12122003305 is 50330022121.

12122003305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50330022121 = 71 ⋅708873551.

It can be written as a sum of positive squares in 2 ways, for example, as 9188372736 + 2933630569 = 95856^2 + 54163^2 .

It is not a de Polignac number, because 12122003305 - 2¹ = 12122003303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122003303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212200326 + ... + 1212200335.

It is an arithmetic number, because the mean of its divisors is an integer number (3636600993).

Almost surely, 2^12122003305 is an apocalyptic number.

It is an amenable number.

12122003305 is a deficient number, since it is larger than the sum of its proper divisors (2424400667).

12122003305 is an equidigital number, since it uses as much as digits as its factorization.

12122003305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424400666.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 12122003305 its reverse (50330022121), we get a palindrome (62452025426).

The spelling of 12122003305 in words is "twelve billion, one hundred twenty-two million, three thousand, three hundred five".