12212022212221 has 8 divisors (see below), whose sum is σ = 13196293893720. Its totient is φ = 11234162724672.

The previous prime is 12212022212149. The next prime is 12212022212227. The reversal of 12212022212221 is 12221222021221.

It can be written as a sum of positive squares in 4 ways, for example, as 6490291236025 + 5721730976196 = 2547605^2 + 2392014^2 .

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 12212022212221 - 2⁹ = 12212022211709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212022212192 and 12212022212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212022212227) 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, 1603044526 + ... + 1603052143.

It is an arithmetic number, because the mean of its divisors is an integer number (1649536736715).

Almost surely, 2^{12212022212221} is an apocalyptic number.

It is an amenable number.

12212022212221 is a deficient number, since it is larger than the sum of its proper divisors (984271681499).

12212022212221 is a wasteful number, since it uses less digits than its factorization.

12212022212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206096975.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12212022212221 its reverse (12221222021221), we get a palindrome (24433244233442).

The spelling of 12212022212221 in words is "twelve trillion, two hundred twelve billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".