12001020200120 has 64 divisors (see below), whose sum is σ = 30894558036480. Its totient is φ = 4109996589696.

The previous prime is 12001020200111. The next prime is 12001020200167. The reversal of 12001020200120 is 2100202010021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23912174 + ... + 24408893.

It is an arithmetic number, because the mean of its divisors is an integer number (482727469320).

Almost surely, 2^{12001020200120} is an apocalyptic number.

12001020200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001020200120 is an abundant number, since it is smaller than the sum of its proper divisors (18893537836360).

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

12001020200120 is a wasteful number, since it uses less digits than its factorization.

12001020200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48321972 (or 48321968 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12001020200120 its reverse (2100202010021), we get a palindrome (14101222210141).

The spelling of 12001020200120 in words is "twelve trillion, one billion, twenty million, two hundred thousand, one hundred twenty".