12051221224 has 32 divisors (see below), whose sum is σ = 25873485120. Its totient is φ = 5154921216.

The previous prime is 12051221213. The next prime is 12051221269. The reversal of 12051221224 is 42212215021.

12051221224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12051221195 and 12051221204.

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 7 ways as a sum of consecutive naturals, for example, 176449 + ... + 235024.

It is an arithmetic number, because the mean of its divisors is an integer number (808546410).

Almost surely, 2^12051221224 is an apocalyptic number.

12051221224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12051221224 is an abundant number, since it is smaller than the sum of its proper divisors (13822263896).

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

12051221224 is a wasteful number, since it uses less digits than its factorization.

12051221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412009 (or 412005 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 12051221224 its reverse (42212215021), we get a palindrome (54263436245).

The spelling of 12051221224 in words is "twelve billion, fifty-one million, two hundred twenty-one thousand, two hundred twenty-four".