12111000012000 has 384 divisors, whose sum is σ = 44496082874880. Its totient is φ = 3199413772800.

The previous prime is 12111000011963. The next prime is 12111000012011. The reversal of 12111000012000 is 21000011121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11031987 + ... + 12080013.

It is an arithmetic number, because the mean of its divisors is an integer number (115875215820).

Almost surely, 2^{12111000012000} is an apocalyptic number.

12111000012000 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 12111000012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22248041437440).

12111000012000 is an abundant number, since it is smaller than the sum of its proper divisors (32385082862880).

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

12111000012000 is a wasteful number, since it uses less digits than its factorization.

12111000012000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048168 (or 1048144 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12111000012000 its reverse (21000011121), we get a palindrome (12132000023121).

The spelling of 12111000012000 in words is "twelve trillion, one hundred eleven billion, twelve thousand".