12012203100 has 288 divisors, whose sum is σ = 37842577920. Its totient is φ = 2932751360.

The previous prime is 12012203059. The next prime is 12012203107. The reversal of 12012203100 is 130221021.

It is a super-2 number, since 2×12012203100² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012203107) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34617127 + ... + 34617473.

It is an arithmetic number, because the mean of its divisors is an integer number (131397840).

Almost surely, 2^12012203100 is an apocalyptic number.

12012203100 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 12012203100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18921288960).

12012203100 is an abundant number, since it is smaller than the sum of its proper divisors (25830374820).

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

12012203100 is a wasteful number, since it uses less digits than its factorization.

12012203100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12012203100 its reverse (130221021), we get a palindrome (12142424121).

The spelling of 12012203100 in words is "twelve billion, twelve million, two hundred three thousand, one hundred".