12355855321 has 2 divisors, whose sum is σ = 12355855322. Its totient is φ = 12355855320.

The previous prime is 12355855313. The next prime is 12355855327.

It is a happy number.

12355855321 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8382318025 + 3973537296 = 91555^2 + 63036^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12355855321 - 2³ = 12355855313 is a prime.

It is not a weakly prime, because it can be changed into another prime (12355855327) 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, 6177927660 + 6177927661.

It is an arithmetic number, because the mean of its divisors is an integer number (6177927661).

Almost surely, 2^12355855321 is an apocalyptic number.

It is an amenable number.

12355855321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355855321 is an equidigital number, since it uses as much as digits as its factorization.

12355855321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180000, while the sum is 40.

The spelling of 12355855321 in words is "twelve billion, three hundred fifty-five million, eight hundred fifty-five thousand, three hundred twenty-one".