12012200100 has 144 divisors (see below), whose sum is σ = 38820848640. Its totient is φ = 3186345600.

The previous prime is 12012200099. The next prime is 12012200117. The reversal of 12012200100 is 100221021.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 504054 + ... + 527346.

Almost surely, 2^12012200100 is an apocalyptic number.

12012200100 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 12012200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19410424320).

12012200100 is an abundant number, since it is smaller than the sum of its proper divisors (26808648540).

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

12012200100 is a wasteful number, since it uses less digits than its factorization.

12012200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23507 (or 23494 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12012200100 its reverse (100221021), we get a palindrome (12112421121).

The spelling of 12012200100 in words is "twelve billion, twelve million, two hundred thousand, one hundred".