12320012100 has 576 divisors, whose sum is σ = 43089242112. Its totient is φ = 2686464000.

The previous prime is 12320012051. The next prime is 12320012147. The reversal of 12320012100 is 121002321.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 115140247 + ... + 115140353.

It is an arithmetic number, because the mean of its divisors is an integer number (74807712).

Almost surely, 2^12320012100 is an apocalyptic number.

12320012100 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 12320012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21544621056).

12320012100 is an abundant number, since it is smaller than the sum of its proper divisors (30769230012).

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

12320012100 is a wasteful number, since it uses less digits than its factorization.

12320012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 229 counting only the distinct ones).

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

Adding to 12320012100 its reverse (121002321), we get a palindrome (12441014421).

The spelling of 12320012100 in words is "twelve billion, three hundred twenty million, twelve thousand, one hundred".