12012223320 has 128 divisors (see below), whose sum is σ = 42148224000. Its totient is φ = 3034661760.

The previous prime is 12012223277. The next prime is 12012223357. The reversal of 12012223320 is 2332221021.

12012223320 is a `hidden beast` number, since 120 + 1 + 2 + 223 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12012223293 and 12012223302.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 272176 + ... + 313215.

It is an arithmetic number, because the mean of its divisors is an integer number (329283000).

Almost surely, 2^12012223320 is an apocalyptic number.

12012223320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012223320 is an abundant number, since it is smaller than the sum of its proper divisors (30136000680).

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

12012223320 is a wasteful number, since it uses less digits than its factorization.

12012223320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585430 (or 585420 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12012223320 its reverse (2332221021), we get a palindrome (14344444341).

The spelling of 12012223320 in words is "twelve billion, twelve million, two hundred twenty-three thousand, three hundred twenty".