12120312012 has 24 divisors (see below), whose sum is σ = 28326880176. Its totient is φ = 4033510848.

The previous prime is 12120311999. The next prime is 12120312077. The reversal of 12120312012 is 21021302121.

It is a junction number, because it is equal to n+sod(n) for n = 12120311982 and 12120312000.

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, 816483 + ... + 831194.

It is an arithmetic number, because the mean of its divisors is an integer number (1180286674).

Almost surely, 2^12120312012 is an apocalyptic number.

12120312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120312012 is an abundant number, since it is smaller than the sum of its proper divisors (16206568164).

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

12120312012 is a wasteful number, since it uses less digits than its factorization.

12120312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648297 (or 1648295 counting only the distinct ones).

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

Adding to 12120312012 its reverse (21021302121), we get a palindrome (33141614133).

The spelling of 12120312012 in words is "twelve billion, one hundred twenty million, three hundred twelve thousand, twelve".