12105532500 has 120 divisors (see below), whose sum is σ = 36831660096. Its totient is φ = 3087744000.

The previous prime is 12105532493. The next prime is 12105532507. The reversal of 12105532500 is 523550121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12105532493) and next prime (12105532507).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105532507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137412 + ... + 207588.

Almost surely, 2^12105532500 is an apocalyptic number.

12105532500 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 12105532500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18415830048).

12105532500 is an abundant number, since it is smaller than the sum of its proper divisors (24726127596).

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

12105532500 is a wasteful number, since it uses less digits than its factorization.

12105532500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70227 (or 70210 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The spelling of 12105532500 in words is "twelve billion, one hundred five million, five hundred thirty-two thousand, five hundred".