12213223331 has 4 divisors (see below), whose sum is σ = 12217180200. Its totient is φ = 12209266464.

The previous prime is 12213223289. The next prime is 12213223349. The reversal of 12213223331 is 13332231221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13332231221 = 23 ⋅579662227.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213223331 is a prime.

It is a super-2 number, since 2×12213223331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213223297 and 12213223306.

It is not an unprimeable number, because it can be changed into a prime (12213223361) 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, 1973801 + ... + 1979978.

It is an arithmetic number, because the mean of its divisors is an integer number (3054295050).

Almost surely, 2^12213223331 is an apocalyptic number.

12213223331 is a deficient number, since it is larger than the sum of its proper divisors (3956869).

12213223331 is an equidigital number, since it uses as much as digits as its factorization.

12213223331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956868.

The product of its digits is 1296, while the sum is 23.

Adding to 12213223331 its reverse (13332231221), we get a palindrome (25545454552).

The spelling of 12213223331 in words is "twelve billion, two hundred thirteen million, two hundred twenty-three thousand, three hundred thirty-one".