12212212201221 has 8 divisors (see below), whose sum is σ = 16283706014080. Its totient is φ = 8141096594592.

The previous prime is 12212212201207. The next prime is 12212212201247. The reversal of 12212212201221 is 12210221221221.

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

It is not a de Polignac number, because 12212212201221 - 2⁹ = 12212212200709 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 (12212212201271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94476205 + ... + 94605378.

It is an arithmetic number, because the mean of its divisors is an integer number (2035463251760).

Almost surely, 2^{12212212201221} is an apocalyptic number.

It is an amenable number.

12212212201221 is a deficient number, since it is larger than the sum of its proper divisors (4071493812859).

12212212201221 is a wasteful number, since it uses less digits than its factorization.

12212212201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189103115.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12212212201221 its reverse (12210221221221), we get a palindrome (24422433422442).

The spelling of 12212212201221 in words is "twelve trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, two hundred twenty-one".