12100500 has 72 divisors (see below), whose sum is σ = 38187240. Its totient is φ = 3225600.

The previous prime is 12100499. The next prime is 12100513. The reversal of 12100500 is 500121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2883204 + 9217296 = 1698^2 + 3036^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3156 + ... + 5844.

Almost surely, 2^12100500 is an apocalyptic number.

12100500 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 12100500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19093620).

12100500 is an abundant number, since it is smaller than the sum of its proper divisors (26086740).

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

12100500 is a wasteful number, since it uses less digits than its factorization.

12100500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714 (or 2699 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 12100500 is about 3478.5772953896. The cubic root of 12100500 is about 229.5802046412.

Adding to 12100500 its reverse (500121), we get a palindrome (12600621).

The spelling of 12100500 in words is "twelve million, one hundred thousand, five hundred".