12423221320 has 32 divisors (see below), whose sum is σ = 27960118200. Its totient is φ = 4967889408.

The previous prime is 12423221303. The next prime is 12423221323. The reversal of 12423221320 is 2312232421.

It can be written as a sum of positive squares in 4 ways, for example, as 7093345284 + 5329876036 = 84222^2 + 73006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12423221291 and 12423221300.

It is not an unprimeable number, because it can be changed into a prime (12423221323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106492 + ... + 190228.

Almost surely, 2^12423221320 is an apocalyptic number.

12423221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12423221320 is an abundant number, since it is smaller than the sum of its proper divisors (15536896880).

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

12423221320 is a wasteful number, since it uses less digits than its factorization.

12423221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87457 (or 87453 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12423221320 its reverse (2312232421), we get a palindrome (14735453741).

The spelling of 12423221320 in words is "twelve billion, four hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty".