12123110112 has 48 divisors (see below), whose sum is σ = 33206785920. Its totient is φ = 3865338752.

The previous prime is 12123110101. The next prime is 12123110177. The reversal of 12123110112 is 21101132121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 12123110091 and 12123110100.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2743062 + ... + 2747477.

It is an arithmetic number, because the mean of its divisors is an integer number (691808040).

Almost surely, 2^12123110112 is an apocalyptic number.

12123110112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123110112 is an abundant number, since it is smaller than the sum of its proper divisors (21083675808).

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

12123110112 is a wasteful number, since it uses less digits than its factorization.

12123110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490575 (or 5490567 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12123110112 its reverse (21101132121), we get a palindrome (33224242233).

The spelling of 12123110112 in words is "twelve billion, one hundred twenty-three million, one hundred ten thousand, one hundred twelve".