12123444112 has 40 divisors (see below), whose sum is σ = 25532490816. Its totient is φ = 5543131776.

The previous prime is 12123444079. The next prime is 12123444127. The reversal of 12123444112 is 21144432121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250108 + ... + 294619.

Almost surely, 2^12123444112 is an apocalyptic number.

It is an amenable number.

12123444112 is an abundant number, since it is smaller than the sum of its proper divisors (13409046704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12123444112 is a wasteful number, since it uses less digits than its factorization.

12123444112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544855 (or 544849 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 12123444112 its reverse (21144432121), we get a palindrome (33267876233).

The spelling of 12123444112 in words is "twelve billion, one hundred twenty-three million, four hundred forty-four thousand, one hundred twelve".