12220130320 has 20 divisors (see below), whose sum is σ = 28411803180. Its totient is φ = 4888052096.

The previous prime is 12220130303. The next prime is 12220130333. The reversal of 12220130320 is 2303102221.

It can be written as a sum of positive squares in 2 ways, for example, as 2757510144 + 9462620176 = 52512^2 + 97276^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12220130294 and 12220130303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76375735 + ... + 76375894.

It is an arithmetic number, because the mean of its divisors is an integer number (1420590159).

Almost surely, 2^12220130320 is an apocalyptic number.

12220130320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220130320 is an abundant number, since it is smaller than the sum of its proper divisors (16191672860).

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

12220130320 is a wasteful number, since it uses less digits than its factorization.

12220130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152751642 (or 152751636 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12220130320 its reverse (2303102221), we get a palindrome (14523232541).

The spelling of 12220130320 in words is "twelve billion, two hundred twenty million, one hundred thirty thousand, three hundred twenty".