20120111201200 has 120 divisors (see below), whose sum is σ = 49962450519936. Its totient is φ = 7778350848000.

The previous prime is 20120111201191. The next prime is 20120111201207. The reversal of 20120111201200 is 210211102102.

It is not an unprimeable number, because it can be changed into a prime (20120111201207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8535660 + ... + 10634740.

Almost surely, 2^{20120111201200} is an apocalyptic number.

20120111201200 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 20120111201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24981225259968).

20120111201200 is an abundant number, since it is smaller than the sum of its proper divisors (29842339318736).

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

20120111201200 is a wasteful number, since it uses less digits than its factorization.

20120111201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099903 (or 2099892 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120111201200 its reverse (210211102102), we get a palindrome (20330322303302).

The spelling of 20120111201200 in words is "twenty trillion, one hundred twenty billion, one hundred eleven million, two hundred one thousand, two hundred".