221322201 has 16 divisors (see below), whose sum is σ = 319106304. Its totient is φ = 135912704.

The previous prime is 221322193. The next prime is 221322293. The reversal of 221322201 is 102223122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221322201 - 2³ = 221322193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221322001) 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, 43770 + ... + 48563.

It is an arithmetic number, because the mean of its divisors is an integer number (19944144).

Almost surely, 2^221322201 is an apocalyptic number.

It is an amenable number.

221322201 is a deficient number, since it is larger than the sum of its proper divisors (97784103).

221322201 is a wasteful number, since it uses less digits than its factorization.

221322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92400.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221322201 is about 14876.9015927376. The cubic root of 221322201 is about 604.8880342854. Note that the first 3 decimals are identical.

Adding to 221322201 its reverse (102223122), we get a palindrome (323545323).

The spelling of 221322201 in words is "two hundred twenty-one million, three hundred twenty-two thousand, two hundred one".