221201202222201 has 4 divisors (see below), whose sum is σ = 294934936296272. Its totient is φ = 147467468148132.

The previous prime is 221201202222167. The next prime is 221201202222241. The reversal of 221201202222201 is 102222202102122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221201202222201 - 2⁴² = 216803155711097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221201202222241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36866867037031 + ... + 36866867037036.

It is an arithmetic number, because the mean of its divisors is an integer number (73733734074068).

Almost surely, 2^{221201202222201} is an apocalyptic number.

It is an amenable number.

221201202222201 is a deficient number, since it is larger than the sum of its proper divisors (73733734074071).

221201202222201 is an equidigital number, since it uses as much as digits as its factorization.

221201202222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73733734074070.

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

Adding to 221201202222201 its reverse (102222202102122), we get a palindrome (323423404324323).

The spelling of 221201202222201 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred two million, two hundred twenty-two thousand, two hundred one".