12126226500 has 240 divisors, whose sum is σ = 39766446720. Its totient is φ = 3216974400.

The previous prime is 12126226499. The next prime is 12126226529. The reversal of 12126226500 is 562262121.

12126226500 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 6 + 2 + 2 + 650 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9192841 + ... + 9194159.

It is an arithmetic number, because the mean of its divisors is an integer number (165693528).

Almost surely, 2^12126226500 is an apocalyptic number.

12126226500 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 12126226500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19883223360).

12126226500 is an abundant number, since it is smaller than the sum of its proper divisors (27640220220).

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

12126226500 is a wasteful number, since it uses less digits than its factorization.

12126226500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 12126226500 its reverse (562262121), we get a palindrome (12688488621).

The spelling of 12126226500 in words is "twelve billion, one hundred twenty-six million, two hundred twenty-six thousand, five hundred".