12232121321 has 24 divisors (see below), whose sum is σ = 15035359680. Its totient is φ = 9894884832.

The previous prime is 12232121263. The next prime is 12232121327. The reversal of 12232121321 is 12312123221.

It is a de Polignac number, because none of the positive numbers 2^k-12232121321 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12232121293 and 12232121302.

It is not an unprimeable number, because it can be changed into a prime (12232121327) 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, 219875 + ... + 269831.

It is an arithmetic number, because the mean of its divisors is an integer number (626473320).

Almost surely, 2^12232121321 is an apocalyptic number.

It is an amenable number.

12232121321 is a deficient number, since it is larger than the sum of its proper divisors (2803238359).

12232121321 is a wasteful number, since it uses less digits than its factorization.

12232121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50253 (or 50246 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12232121321 its reverse (12312123221), we get a palindrome (24544244542).

The spelling of 12232121321 in words is "twelve billion, two hundred thirty-two million, one hundred twenty-one thousand, three hundred twenty-one".