12011001100 has 72 divisors (see below), whose sum is σ = 29893031168. Its totient is φ = 4103438400.

The previous prime is 12011001071. The next prime is 12011001133. The reversal of 12011001100 is 110011021.

12011001100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (7).

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, 167785 + ... + 228415.

Almost surely, 2^12011001100 is an apocalyptic number.

12011001100 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 12011001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14946515584).

12011001100 is an abundant number, since it is smaller than the sum of its proper divisors (17882030068).

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

12011001100 is a wasteful number, since it uses less digits than its factorization.

12011001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60935 (or 60928 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12011001100 its reverse (110011021), we get a palindrome (12121012121).

The spelling of 12011001100 in words is "twelve billion, eleven million, one thousand, one hundred".