12123223012 has 12 divisors (see below), whose sum is σ = 21789036220. Its totient is φ = 5897784096.

The previous prime is 12123222989. The next prime is 12123223027. The reversal of 12123223012 is 21032232121.

It can be written as a sum of positive squares in 2 ways, for example, as 8418796516 + 3704426496 = 91754^2 + 60864^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40956687 + ... + 40956982.

Almost surely, 2^12123223012 is an apocalyptic number.

It is an amenable number.

12123223012 is a deficient number, since it is larger than the sum of its proper divisors (9665813208).

12123223012 is a wasteful number, since it uses less digits than its factorization.

12123223012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81913710 (or 81913708 counting only the distinct ones).

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

Adding to 12123223012 its reverse (21032232121), we get a palindrome (33155455133).

The spelling of 12123223012 in words is "twelve billion, one hundred twenty-three million, two hundred twenty-three thousand, twelve".