12130223220 has 72 divisors (see below), whose sum is σ = 37159373160. Its totient is φ = 3202694400.

The previous prime is 12130223173. The next prime is 12130223297. The reversal of 12130223220 is 2232203121.

12130223220 is a `hidden beast` number, since 121 + 302 + 23 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6442951824 + 5687271396 = 80268^2 + 75414^2 .

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 = 12130223193 and 12130223202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315435 + ... + 351794.

It is an arithmetic number, because the mean of its divisors is an integer number (516102405).

Almost surely, 2^12130223220 is an apocalyptic number.

12130223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12130223220 is an abundant number, since it is smaller than the sum of its proper divisors (25029149940).

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

12130223220 is a wasteful number, since it uses less digits than its factorization.

12130223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667345 (or 667340 counting only the distinct ones).

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

Adding to 12130223220 its reverse (2232203121), we get a palindrome (14362426341).

The spelling of 12130223220 in words is "twelve billion, one hundred thirty million, two hundred twenty-three thousand, two hundred twenty".