12123102012 has 48 divisors (see below), whose sum is σ = 32361783552. Its totient is φ = 3460152960.

The previous prime is 12123102011. The next prime is 12123102053. The reversal of 12123102012 is 21020132121.

It is a junction number, because it is equal to n+sod(n) for n = 12123101982 and 12123102000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123102011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7248 + ... + 155880.

It is an arithmetic number, because the mean of its divisors is an integer number (674203824).

Almost surely, 2^12123102012 is an apocalyptic number.

12123102012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123102012 is an abundant number, since it is smaller than the sum of its proper divisors (20238681540).

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

12123102012 is a wasteful number, since it uses less digits than its factorization.

12123102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149618 (or 149616 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12123102012 its reverse (21020132121), we get a palindrome (33143234133).

The spelling of 12123102012 in words is "twelve billion, one hundred twenty-three million, one hundred two thousand, twelve".