12020121221200 has 60 divisors (see below), whose sum is σ = 29164265502588. Its totient is φ = 4760444032000.

The previous prime is 12020121221183. The next prime is 12020121221231. The reversal of 12020121221200 is 212212102021.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1503409490496 + 10516711730704 = 1226136^2 + 3242948^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 148723477 + ... + 148804276.

Almost surely, 2^{12020121221200} is an apocalyptic number.

12020121221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020121221200 is an abundant number, since it is smaller than the sum of its proper divisors (17144144281388).

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

12020121221200 is a wasteful number, since it uses less digits than its factorization.

12020121221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297527872 (or 297527861 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12020121221200 its reverse (212212102021), we get a palindrome (12232333323221).

The spelling of 12020121221200 in words is "twelve trillion, twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred".