12202002212221 has 4 divisors (see below), whose sum is σ = 12919767048252. Its totient is φ = 11484237376192.

The previous prime is 12202002212219. The next prime is 12202002212237. The reversal of 12202002212221 is 12221220020221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7562885004900 + 4639117207321 = 2750070^2 + 2153861^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202002212221 - 2¹ = 12202002212219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202002212261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358882417990 + ... + 358882418023.

It is an arithmetic number, because the mean of its divisors is an integer number (3229941762063).

Almost surely, 2^{12202002212221} is an apocalyptic number.

It is an amenable number.

12202002212221 is a deficient number, since it is larger than the sum of its proper divisors (717764836031).

12202002212221 is an equidigital number, since it uses as much as digits as its factorization.

12202002212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717764836030.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12202002212221 its reverse (12221220020221), we get a palindrome (24423222232442).

The spelling of 12202002212221 in words is "twelve trillion, two hundred two billion, two million, two hundred twelve thousand, two hundred twenty-one".