221202222201 has 12 divisors (see below), whose sum is σ = 319632127828. Its totient is φ = 147413775744.

The previous prime is 221202222181. The next prime is 221202222223. The reversal of 221202222201 is 102222202122.

221202222201 is a `hidden beast` number, since 221 + 2 + 0 + 222 + 220 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 206319442176 + 14882780025 = 454224^2 + 121995^2 .

It is not a de Polignac number, because 221202222201 - 2⁹ = 221202221689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202232201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4505260 + ... + 4554093.

Almost surely, 2^221202222201 is an apocalyptic number.

It is an amenable number.

221202222201 is a deficient number, since it is larger than the sum of its proper divisors (98429905627).

221202222201 is a wasteful number, since it uses less digits than its factorization.

221202222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9062072 (or 9062069 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221202222201 its reverse (102222202122), we get a palindrome (323424424323).

The spelling of 221202222201 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty-two thousand, two hundred one".