12120023112 has 64 divisors (see below), whose sum is σ = 32201971200. Its totient is φ = 3788190720.

The previous prime is 12120023059. The next prime is 12120023117. The reversal of 12120023112 is 21132002121.

It is a junction number, because it is equal to n+sod(n) for n = 12120023091 and 12120023100.

It is not an unprimeable number, because it can be changed into a prime (12120023117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54537 + ... + 164967.

It is an arithmetic number, because the mean of its divisors is an integer number (503155800).

Almost surely, 2^12120023112 is an apocalyptic number.

12120023112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120023112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16100985600).

12120023112 is an abundant number, since it is smaller than the sum of its proper divisors (20081948088).

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

12120023112 is a wasteful number, since it uses less digits than its factorization.

12120023112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110726 (or 110722 counting only the distinct ones).

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

Adding to 12120023112 its reverse (21132002121), we get a palindrome (33252025233).

The spelling of 12120023112 in words is "twelve billion, one hundred twenty million, twenty-three thousand, one hundred twelve".