12210223345 has 4 divisors (see below), whose sum is σ = 14652268020. Its totient is φ = 9768178672.

The previous prime is 12210223343. The next prime is 12210223349. The reversal of 12210223345 is 54332201221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54332201221 = 17393 ⋅3123797.

It can be written as a sum of positive squares in 2 ways, for example, as 4169155761 + 8041067584 = 64569^2 + 89672^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210223345 - 2¹ = 12210223343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12210223343) 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 in 3 ways as a sum of consecutive naturals, for example, 1221022330 + ... + 1221022339.

It is an arithmetic number, because the mean of its divisors is an integer number (3663067005).

Almost surely, 2^12210223345 is an apocalyptic number.

It is an amenable number.

12210223345 is a deficient number, since it is larger than the sum of its proper divisors (2442044675).

12210223345 is an equidigital number, since it uses as much as digits as its factorization.

12210223345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442044674.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12210223345 its reverse (54332201221), we get a palindrome (66542424566).

The spelling of 12210223345 in words is "twelve billion, two hundred ten million, two hundred twenty-three thousand, three hundred forty-five".