20120211111200 has 144 divisors (see below), whose sum is σ = 49532686830144. Its totient is φ = 7980405888000.

The previous prime is 20120211111151. The next prime is 20120211111233. The reversal of 20120211111200 is 211111202102.

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, 67136087 + ... + 67435113.

It is an arithmetic number, because the mean of its divisors is an integer number (343976991876).

Almost surely, 2^{20120211111200} is an apocalyptic number.

20120211111200 is a gapful number since it is divisible by the number (20) 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 20120211111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766343415072).

20120211111200 is an abundant number, since it is smaller than the sum of its proper divisors (29412475718944).

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

20120211111200 is a wasteful number, since it uses less digits than its factorization.

20120211111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299755 (or 299742 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120211111200 its reverse (211111202102), we get a palindrome (20331322313302).

The spelling of 20120211111200 in words is "twenty trillion, one hundred twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred".