12221212213 has 8 divisors (see below), whose sum is σ = 13979118528. Its totient is φ = 10466310624.

The previous prime is 12221212187. The next prime is 12221212247. The reversal of 12221212213 is 31221212221.

12221212213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12221212213 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 (12221212253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742456 + ... + 758737.

It is an arithmetic number, because the mean of its divisors is an integer number (1747389816).

Almost surely, 2^12221212213 is an apocalyptic number.

It is an amenable number.

12221212213 is a deficient number, since it is larger than the sum of its proper divisors (1757906315).

12221212213 is a wasteful number, since it uses less digits than its factorization.

12221212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502363.

The product of its digits is 192, while the sum is 19.

Adding to 12221212213 its reverse (31221212221), we get a palindrome (43442424434).

The spelling of 12221212213 in words is "twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred thirteen".