12212021212221 has 8 divisors (see below), whose sum is σ = 16282901529504. Its totient is φ = 8141244184880.

The previous prime is 12212021212177. The next prime is 12212021212319. The reversal of 12212021212221 is 12221212021221.

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 12212021212221 - 2¹⁰ = 12212021211197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212021412221) 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, 25546191 + ... + 26019836.

It is an arithmetic number, because the mean of its divisors is an integer number (2035362691188).

Almost surely, 2^{12212021212221} is an apocalyptic number.

It is an amenable number.

12212021212221 is a deficient number, since it is larger than the sum of its proper divisors (4070880317283).

12212021212221 is an equidigital number, since it uses as much as digits as its factorization.

12212021212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51644971.

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

Adding to 12212021212221 its reverse (12221212021221), we get a palindrome (24433233233442).

The spelling of 12212021212221 in words is "twelve trillion, two hundred twelve billion, twenty-one million, two hundred twelve thousand, two hundred twenty-one".