12001211210020 has 48 divisors (see below), whose sum is σ = 26308132800768. Its totient is φ = 4590052030080.

The previous prime is 12001211209987. The next prime is 12001211210041. The reversal of 12001211210020 is 2001211210021.

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, 3641496 + ... + 6104335.

It is an arithmetic number, because the mean of its divisors is an integer number (548086100016).

Almost surely, 2^{12001211210020} is an apocalyptic number.

12001211210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001211210020 is an abundant number, since it is smaller than the sum of its proper divisors (14306921590748).

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

12001211210020 is a wasteful number, since it uses less digits than its factorization.

12001211210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748540 (or 9748538 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12001211210020 its reverse (2001211210021), we get a palindrome (14002422420041).

Subtracting from 12001211210020 its reverse (2001211210021), we obtain a palindrome (9999999999999).

The spelling of 12001211210020 in words is "twelve trillion, one billion, two hundred eleven million, two hundred ten thousand, twenty".