12111201100 has 18 divisors (see below), whose sum is σ = 26281306604. Its totient is φ = 4844480400.

The previous prime is 12111201073. The next prime is 12111201119. The reversal of 12111201100 is 110211121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60555906 + ... + 60556105.

Almost surely, 2^12111201100 is an apocalyptic number.

12111201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111201100 is an abundant number, since it is smaller than the sum of its proper divisors (14170105504).

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

12111201100 is a wasteful number, since it uses less digits than its factorization.

12111201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121112025 (or 121112018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12111201100 its reverse (110211121), we get a palindrome (12221412221).

The spelling of 12111201100 in words is "twelve billion, one hundred eleven million, two hundred one thousand, one hundred".