12123877500 has 360 divisors, whose sum is σ = 45403566208. Its totient is φ = 2770200000.

The previous prime is 12123877481. The next prime is 12123877517. The reversal of 12123877500 is 577832121.

12123877500 is a `hidden beast` number, since 121 + 23 + 8 + 7 + 7 + 500 = 666.

12123877500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4251075 + ... + 4253925.

Almost surely, 2^12123877500 is an apocalyptic number.

12123877500 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 12123877500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22701783104).

12123877500 is an abundant number, since it is smaller than the sum of its proper divisors (33279688708).

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

12123877500 is an equidigital number, since it uses as much as digits as its factorization.

12123877500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 12123877500 in words is "twelve billion, one hundred twenty-three million, eight hundred seventy-seven thousand, five hundred".