12020232321 has 6 divisors (see below), whose sum is σ = 17362557810. Its totient is φ = 8013488208.

The previous prime is 12020232319. The next prime is 12020232383. The reversal of 12020232321 is 12323202021.

12020232321 is a `hidden beast` number, since 120 + 202 + 323 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6518301696 + 5501930625 = 80736^2 + 74175^2 .

It is not a de Polignac number, because 12020232321 - 2¹ = 12020232319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020232294 and 12020232303.

It is not an unprimeable number, because it can be changed into a prime (12020232311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667790676 + ... + 667790693.

It is an arithmetic number, because the mean of its divisors is an integer number (2893759635).

Almost surely, 2^12020232321 is an apocalyptic number.

It is an amenable number.

12020232321 is a deficient number, since it is larger than the sum of its proper divisors (5342325489).

12020232321 is a wasteful number, since it uses less digits than its factorization.

12020232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335581375 (or 1335581372 counting only the distinct ones).

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

Adding to 12020232321 its reverse (12323202021), we get a palindrome (24343434342).

The spelling of 12020232321 in words is "twelve billion, twenty million, two hundred thirty-two thousand, three hundred twenty-one".