12120021021200 has 120 divisors (see below), whose sum is σ = 29598907632000. Its totient is φ = 4768016140800.

The previous prime is 12120021021193. The next prime is 12120021021211. The reversal of 12120021021200 is 212012002121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288557801 + ... + 288599799.

It is an arithmetic number, because the mean of its divisors is an integer number (246657563600).

Almost surely, 2^{12120021021200} is an apocalyptic number.

12120021021200 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 12120021021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14799453816000).

12120021021200 is an abundant number, since it is smaller than the sum of its proper divisors (17478886610800).

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

12120021021200 is a wasteful number, since it uses less digits than its factorization.

12120021021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53905 (or 53894 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12120021021200 its reverse (212012002121), we get a palindrome (12332033023321).

The spelling of 12120021021200 in words is "twelve trillion, one hundred twenty billion, twenty-one million, twenty-one thousand, two hundred".