12323432221 has 16 divisors (see below), whose sum is σ = 12893880384. Its totient is φ = 11768891904.

The previous prime is 12323432213. The next prime is 12323432239. The reversal of 12323432221 is 12223432321.

It is a cyclic number.

It is not a de Polignac number, because 12323432221 - 2³ = 12323432213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323432321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328395 + ... + 363991.

It is an arithmetic number, because the mean of its divisors is an integer number (805867524).

Almost surely, 2^12323432221 is an apocalyptic number.

It is an amenable number.

12323432221 is a deficient number, since it is larger than the sum of its proper divisors (570448163).

12323432221 is an equidigital number, since it uses as much as digits as its factorization.

12323432221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35820.

The product of its digits is 3456, while the sum is 25.

Adding to 12323432221 its reverse (12223432321), we get a palindrome (24546864542).

The spelling of 12323432221 in words is "twelve billion, three hundred twenty-three million, four hundred thirty-two thousand, two hundred twenty-one".