12123201223 has 16 divisors (see below), whose sum is σ = 14065173504. Its totient is φ = 10234062720.

The previous prime is 12123201221. The next prime is 12123201239. The reversal of 12123201223 is 32210232121.

It is not a de Polignac number, because 12123201223 - 2¹ = 12123201221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12123201223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123201221) 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 15 ways as a sum of consecutive naturals, for example, 473086 + ... + 498052.

It is an arithmetic number, because the mean of its divisors is an integer number (879073344).

Almost surely, 2^12123201223 is an apocalyptic number.

12123201223 is a deficient number, since it is larger than the sum of its proper divisors (1941972281).

12123201223 is an equidigital number, since it uses as much as digits as its factorization.

12123201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26022.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12123201223 its reverse (32210232121), we get a palindrome (44333433344).

The spelling of 12123201223 in words is "twelve billion, one hundred twenty-three million, two hundred one thousand, two hundred twenty-three".