12213123213331 has 4 divisors (see below), whose sum is σ = 12221007736000. Its totient is φ = 12205238690664.

The previous prime is 12213123213289. The next prime is 12213123213349. The reversal of 12213123213331 is 13331232131221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213123213331 is a prime.

It is a super-2 number, since 2×12213123213331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12213123213331.

It is not an unprimeable number, because it can be changed into a prime (12213123213131) 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, 3942259011 + ... + 3942262108.

It is an arithmetic number, because the mean of its divisors is an integer number (3055251934000).

Almost surely, 2^{12213123213331} is an apocalyptic number.

12213123213331 is a deficient number, since it is larger than the sum of its proper divisors (7884522669).

12213123213331 is an equidigital number, since it uses as much as digits as its factorization.

12213123213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884522668.

The product of its digits is 3888, while the sum is 28.

Adding to 12213123213331 its reverse (13331232131221), we get a palindrome (25544355344552).

The spelling of 12213123213331 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-three million, two hundred thirteen thousand, three hundred thirty-one".