12121203200000 has 156 divisors (see below), whose sum is σ = 30297401740620. Its totient is φ = 4848476160000.

The previous prime is 12121203199981. The next prime is 12121203200011. The reversal of 12121203200000 is 230212121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7340718309376 + 4780484890624 = 2709376^2 + 2186432^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12326516 + ... + 13273484.

Almost surely, 2^{12121203200000} is an apocalyptic number.

12121203200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121203200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15148700870310).

12121203200000 is an abundant number, since it is smaller than the sum of its proper divisors (18176198540620).

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

12121203200000 is an frugal number, since it uses more digits than its factorization.

12121203200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947018 (or 946976 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12121203200000 its reverse (230212121), we get a palindrome (12121433412121).

The spelling of 12121203200000 in words is "twelve trillion, one hundred twenty-one billion, two hundred three million, two hundred thousand".