12120454500 has 384 divisors, whose sum is σ = 44482314240. Its totient is φ = 2491200000.

The previous prime is 12120454477. The next prime is 12120454501. The reversal of 12120454500 is 545402121.

It is not an unprimeable number, because it can be changed into a prime (12120454501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11664981 + ... + 11666019.

It is an arithmetic number, because the mean of its divisors is an integer number (115839360).

Almost surely, 2^12120454500 is an apocalyptic number.

12120454500 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 12120454500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22241157120).

12120454500 is an abundant number, since it is smaller than the sum of its proper divisors (32361859740).

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

12120454500 is a wasteful number, since it uses less digits than its factorization.

12120454500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 12120454500 its reverse (545402121), we get a palindrome (12665856621).

The spelling of 12120454500 in words is "twelve billion, one hundred twenty million, four hundred fifty-four thousand, five hundred".