12215643353 has 2 divisors, whose sum is σ = 12215643354. Its totient is φ = 12215643352.

The previous prime is 12215643331. The next prime is 12215643379. The reversal of 12215643353 is 35334651221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8392941769 + 3822701584 = 91613^2 + 61828^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215643353 - 2¹² = 12215639257 is a prime.

It is not a weakly prime, because it can be changed into another prime (12215643383) 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, 6107821676 + 6107821677.

It is an arithmetic number, because the mean of its divisors is an integer number (6107821677).

Almost surely, 2^12215643353 is an apocalyptic number.

It is an amenable number.

12215643353 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215643353 is an equidigital number, since it uses as much as digits as its factorization.

12215643353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 35.

The spelling of 12215643353 in words is "twelve billion, two hundred fifteen million, six hundred forty-three thousand, three hundred fifty-three".