12121211223 has 40 divisors (see below), whose sum is σ = 19823790096. Its totient is φ = 7319894400.

The previous prime is 12121211173. The next prime is 12121211233. The reversal of 12121211223 is 32211212121.

12121211223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12121211223 - 2⁶ = 12121211159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121211196 and 12121211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121211233) 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 39 ways as a sum of consecutive naturals, for example, 226165 + ... + 274577.

Almost surely, 2^12121211223 is an apocalyptic number.

12121211223 is a deficient number, since it is larger than the sum of its proper divisors (7702578873).

12121211223 is a wasteful number, since it uses less digits than its factorization.

12121211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48717 (or 48708 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 12121211223 its reverse (32211212121), we get a palindrome (44332423344).

The spelling of 12121211223 in words is "twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-three".