12001211112020 has 48 divisors (see below), whose sum is σ = 27146386180368. Its totient is φ = 4430369771520.

The previous prime is 12001211111983. The next prime is 12001211112041. The reversal of 12001211112020 is 2021111210021.

It can be written as a sum of positive squares in 8 ways, for example, as 272956092304 + 11728255019716 = 522452^2 + 3424654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12001211111986 and 12001211112004.

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, 3045341 + ... + 5768580.

It is an arithmetic number, because the mean of its divisors is an integer number (565549712091).

Almost surely, 2^{12001211112020} is an apocalyptic number.

12001211112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001211112020 is an abundant number, since it is smaller than the sum of its proper divisors (15145175068348).

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

12001211112020 is a wasteful number, since it uses less digits than its factorization.

12001211112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819180 (or 8819178 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12001211112020 its reverse (2021111210021), we get a palindrome (14022322322041).

The spelling of 12001211112020 in words is "twelve trillion, one billion, two hundred eleven million, one hundred twelve thousand, twenty".