12011212221200 has 60 divisors (see below), whose sum is σ = 28866935612160. Its totient is φ = 4802820247680.

The previous prime is 12011212221191. The next prime is 12011212221293. The reversal of 12011212221200 is 212221211021.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4045760 + ... + 6355359.

It is an arithmetic number, because the mean of its divisors is an integer number (481115593536).

Almost surely, 2^{12011212221200} is an apocalyptic number.

12011212221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011212221200 is an abundant number, since it is smaller than the sum of its proper divisors (16855723390960).

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

12011212221200 is a wasteful number, since it uses less digits than its factorization.

12011212221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404024 (or 10404013 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12011212221200 its reverse (212221211021), we get a palindrome (12223433432221).

The spelling of 12011212221200 in words is "twelve trillion, eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred".