12023220321 has 24 divisors (see below), whose sum is σ = 19930237184. Its totient is φ = 6841895040.

The previous prime is 12023220317. The next prime is 12023220329. The reversal of 12023220321 is 12302232021.

12023220321 is a `hidden beast` number, since 1 + 20 + 2 + 322 + 0 + 321 = 666.

It is not a de Polignac number, because 12023220321 - 2² = 12023220317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12023220294 and 12023220303.

It is not an unprimeable number, because it can be changed into a prime (12023220329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380761 + ... + 411126.

Almost surely, 2^12023220321 is an apocalyptic number.

It is an amenable number.

12023220321 is a deficient number, since it is larger than the sum of its proper divisors (7907016863).

12023220321 is a wasteful number, since it uses less digits than its factorization.

12023220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792141 (or 792138 counting only the distinct ones).

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

Adding to 12023220321 its reverse (12302232021), we get a palindrome (24325452342).

The spelling of 12023220321 in words is "twelve billion, twenty-three million, two hundred twenty thousand, three hundred twenty-one".