12001121212200 has 96 divisors (see below), whose sum is σ = 39391915541760. Its totient is φ = 3012046105600.

The previous prime is 12001121212189. The next prime is 12001121212207. The reversal of 12001121212200 is 221212110021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12001121212200.

It is not an unprimeable number, because it can be changed into a prime (12001121212207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 588280056 + ... + 588300455.

It is an arithmetic number, because the mean of its divisors is an integer number (410332453560).

Almost surely, 2^{12001121212200} is an apocalyptic number.

12001121212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001121212200 is an abundant number, since it is smaller than the sum of its proper divisors (27390794329560).

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

12001121212200 is a wasteful number, since it uses less digits than its factorization.

12001121212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176580547 (or 1176580538 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12001121212200 its reverse (221212110021), we get a palindrome (12222333322221).

The spelling of 12001121212200 in words is "twelve trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred".