2012111201100 has 864 divisors, whose sum is σ = 8302259621376. Its totient is φ = 369150566400.

The previous prime is 2012111201029. The next prime is 2012111201101. The reversal of 2012111201100 is 11021112102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (2012111201101) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 48327492 + ... + 48369108.

It is an arithmetic number, because the mean of its divisors is an integer number (9609096784).

Almost surely, 2^{2012111201100} is an apocalyptic number.

2012111201100 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 2012111201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4151129810688).

2012111201100 is an abundant number, since it is smaller than the sum of its proper divisors (6290148420276).

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

2012111201100 is a wasteful number, since it uses less digits than its factorization.

2012111201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41695 (or 41681 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2012111201100 its reverse (11021112102), we get a palindrome (2023132313202).

The spelling of 2012111201100 in words is "two trillion, twelve billion, one hundred eleven million, two hundred one thousand, one hundred".