12121200121200 has 120 divisors (see below), whose sum is σ = 39124643707776. Its totient is φ = 3207645792000.

The previous prime is 12121200121181. The next prime is 12121200121207. The reversal of 12121200121200 is 212100212121.

It is a tau number, because it is divible by the number of its divisors (120).

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 12121200121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38396236 + ... + 38710635.

Almost surely, 2^{12121200121200} is an apocalyptic number.

12121200121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121200121200 is an abundant number, since it is smaller than the sum of its proper divisors (27003443586576).

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

12121200121200 is a wasteful number, since it uses less digits than its factorization.

12121200121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77107023 (or 77107012 counting only the distinct ones).

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

Adding to 12121200121200 its reverse (212100212121), we get a palindrome (12333300333321).

The spelling of 12121200121200 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred".