12213223213 has 4 divisors (see below), whose sum is σ = 12511106748. Its totient is φ = 11915339680.

The previous prime is 12213223201. The next prime is 12213223271. The reversal of 12213223213 is 31232231221.

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 3792958569 + 8420264644 = 61587^2 + 91762^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213223213 - 2⁹ = 12213222701 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 (12213223613) 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, 148941706 + ... + 148941787.

It is an arithmetic number, because the mean of its divisors is an integer number (3127776687).

Almost surely, 2^12213223213 is an apocalyptic number.

It is an amenable number.

12213223213 is a deficient number, since it is larger than the sum of its proper divisors (297883535).

12213223213 is an equidigital number, since it uses as much as digits as its factorization.

12213223213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297883534.

The product of its digits is 864, while the sum is 22.

Adding to 12213223213 its reverse (31232231221), we get a palindrome (43445454434).

The spelling of 12213223213 in words is "twelve billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred thirteen".