12001221120012 has 24 divisors (see below), whose sum is σ = 28190787870000. Its totient is φ = 3973558670016.

The previous prime is 12001221120001. The next prime is 12001221120019. The reversal of 12001221120012 is 21002112210021.

It is a junction number, because it is equal to n+sod(n) for n = 12001221119973 and 12001221120000.

It is not an unprimeable number, because it can be changed into a prime (12001221120019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3356044387 + ... + 3356047962.

It is an arithmetic number, because the mean of its divisors is an integer number (1174616161250).

Almost surely, 2^{12001221120012} is an apocalyptic number.

12001221120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12001221120012 is an abundant number, since it is smaller than the sum of its proper divisors (16189566749988).

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

12001221120012 is a wasteful number, since it uses less digits than its factorization.

12001221120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712092505 (or 6712092503 counting only the distinct ones).

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

Adding to 12001221120012 its reverse (21002112210021), we get a palindrome (33003333330033).

The spelling of 12001221120012 in words is "twelve trillion, one billion, two hundred twenty-one million, one hundred twenty thousand, twelve".