2221202212221 has 16 divisors (see below), whose sum is σ = 3129486888960. Its totient is φ = 1398489446640.

The previous prime is 2221202212189. The next prime is 2221202212247. The reversal of 2221202212221 is 1222122021222.

It is not a de Polignac number, because 2221202212221 - 2⁵ = 2221202212189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221202212291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203737185 + ... + 203748086.

It is an arithmetic number, because the mean of its divisors is an integer number (195592930560).

Almost surely, 2^{2221202212221} is an apocalyptic number.

It is an amenable number.

2221202212221 is a deficient number, since it is larger than the sum of its proper divisors (908284676739).

2221202212221 is a wasteful number, since it uses less digits than its factorization.

2221202212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407485376.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2221202212221 its reverse (1222122021222), we get a palindrome (3443324233443).

The spelling of 2221202212221 in words is "two trillion, two hundred twenty-one billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".