12205018252 has 24 divisors (see below), whose sum is σ = 25005405600. Its totient is φ = 5103143040.

The previous prime is 12205018187. The next prime is 12205018253. The reversal of 12205018252 is 25281050221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12205018252.

It is not an unprimeable number, because it can be changed into a prime (12205018253) 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 7 ways as a sum of consecutive naturals, for example, 5314627 + ... + 5316922.

It is an arithmetic number, because the mean of its divisors is an integer number (1041891900).

Almost surely, 2^12205018252 is an apocalyptic number.

It is an amenable number.

12205018252 is an abundant number, since it is smaller than the sum of its proper divisors (12800387348).

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

12205018252 is a wasteful number, since it uses less digits than its factorization.

12205018252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10631601 (or 10631599 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 12205018252 its reverse (25281050221), we get a palindrome (37486068473).

The spelling of 12205018252 in words is "twelve billion, two hundred five million, eighteen thousand, two hundred fifty-two".