221201002205 has 16 divisors (see below), whose sum is σ = 272648808624. Its totient is φ = 172156907520.

The previous prime is 221201002199. The next prime is 221201002207. The reversal of 221201002205 is 502200102122.

It can be written as a sum of positive squares in 8 ways, for example, as 19961733796 + 201239268409 = 141286^2 + 448597^2 .

It is not a de Polignac number, because 221201002205 - 2¹⁴ = 221200985821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201002207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1529399 + ... + 1667771.

It is an arithmetic number, because the mean of its divisors is an integer number (17040550539).

Almost surely, 2^221201002205 is an apocalyptic number.

It is an amenable number.

221201002205 is a deficient number, since it is larger than the sum of its proper divisors (51447806419).

221201002205 is a wasteful number, since it uses less digits than its factorization.

221201002205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147056.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 221201002205 its reverse (502200102122), we get a palindrome (723401104327).

The spelling of 221201002205 in words is "two hundred twenty-one billion, two hundred one million, two thousand, two hundred five".