12001212120220 has 24 divisors (see below), whose sum is σ = 25313569891344. Its totient is φ = 4779337335936.

The previous prime is 12001212120187. The next prime is 12001212120223. The reversal of 12001212120220 is 2202121210021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12001212120194 and 12001212120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001212120223) 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, 1321714857 + ... + 1321723936.

It is an arithmetic number, because the mean of its divisors is an integer number (1054732078806).

Almost surely, 2^{12001212120220} is an apocalyptic number.

12001212120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001212120220 is an abundant number, since it is smaller than the sum of its proper divisors (13312357771124).

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

12001212120220 is a wasteful number, since it uses less digits than its factorization.

12001212120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643439029 (or 2643439027 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12001212120220 its reverse (2202121210021), we get a palindrome (14203333330241).

The spelling of 12001212120220 in words is "twelve trillion, one billion, two hundred twelve million, one hundred twenty thousand, two hundred twenty".