12213023321 has 4 divisors (see below), whose sum is σ = 12218677044. Its totient is φ = 12207369600.

The previous prime is 12213023293. The next prime is 12213023393. The reversal of 12213023321 is 12332031221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8226490000 + 3986533321 = 90700^2 + 63139^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213023321 - 2¹⁴ = 12213006937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213023293 and 12213023302.

It is not an unprimeable number, because it can be changed into a prime (12213023021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823620 + ... + 2827941.

It is an arithmetic number, because the mean of its divisors is an integer number (3054669261).

Almost surely, 2^12213023321 is an apocalyptic number.

It is an amenable number.

12213023321 is a deficient number, since it is larger than the sum of its proper divisors (5653723).

12213023321 is an equidigital number, since it uses as much as digits as its factorization.

12213023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5653722.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12213023321 its reverse (12332031221), we get a palindrome (24545054542).

The spelling of 12213023321 in words is "twelve billion, two hundred thirteen million, twenty-three thousand, three hundred twenty-one".