12120021120012 has 48 divisors (see below), whose sum is σ = 30623699844192. Its totient is φ = 3708633738240.

The previous prime is 12120021120001. The next prime is 12120021120013. The reversal of 12120021120012 is 21002112002121.

It is a junction number, because it is equal to n+sod(n) for n = 12120021119973 and 12120021120000.

It is not an unprimeable number, because it can be changed into a prime (12120021120013) 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, 214591773 + ... + 214648244.

It is an arithmetic number, because the mean of its divisors is an integer number (637993746754).

Almost surely, 2^{12120021120012} is an apocalyptic number.

12120021120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120021120012 is an abundant number, since it is smaller than the sum of its proper divisors (18503678724180).

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

12120021120012 is a wasteful number, since it uses less digits than its factorization.

12120021120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429240218 (or 429240216 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12120021120012 its reverse (21002112002121), we get a palindrome (33122133122133).

The spelling of 12120021120012 in words is "twelve trillion, one hundred twenty billion, twenty-one million, one hundred twenty thousand, twelve".