12211210220221 has 8 divisors (see below), whose sum is σ = 12303775108800. Its totient is φ = 12118712681280.

The previous prime is 12211210220189. The next prime is 12211210220257. The reversal of 12211210220221 is 12202201211221.

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

It is a cyclic number.

It is not a de Polignac number, because 12211210220221 - 2⁵ = 12211210220189 is a prime.

It is a super-3 number, since 3×12211210220221³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211210223221) 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, 16473385 + ... + 17198686.

It is an arithmetic number, because the mean of its divisors is an integer number (1537971888600).

Almost surely, 2^{12211210220221} is an apocalyptic number.

It is an amenable number.

12211210220221 is a deficient number, since it is larger than the sum of its proper divisors (92564888579).

12211210220221 is a wasteful number, since it uses less digits than its factorization.

12211210220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33674819.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12211210220221 its reverse (12202201211221), we get a palindrome (24413411431442).

The spelling of 12211210220221 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".