12211451500 has 24 divisors (see below), whose sum is σ = 26669811168. Its totient is φ = 4884580400.

The previous prime is 12211451471. The next prime is 12211451501. The reversal of 12211451500 is 515411221.

It is not an unprimeable number, because it can be changed into a prime (12211451501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12210952 + ... + 12211951.

It is an arithmetic number, because the mean of its divisors is an integer number (1111242132).

Almost surely, 2^12211451500 is an apocalyptic number.

12211451500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211451500 is an abundant number, since it is smaller than the sum of its proper divisors (14458359668).

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

12211451500 is a wasteful number, since it uses less digits than its factorization.

12211451500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24422922 (or 24422910 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 12211451500 its reverse (515411221), we get a palindrome (12726862721).

The spelling of 12211451500 in words is "twelve billion, two hundred eleven million, four hundred fifty-one thousand, five hundred".