221302201 has 4 divisors (see below), whose sum is σ = 224333812. Its totient is φ = 218270592.

The previous prime is 221302187. The next prime is 221302223. The reversal of 221302201 is 102203122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168376576 + 52925625 = 12976^2 + 7275^2 .

It is a cyclic number.

It is not a de Polignac number, because 221302201 - 2¹³ = 221294009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221302241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515696 + ... + 1515841.

It is an arithmetic number, because the mean of its divisors is an integer number (56083453).

Almost surely, 2^221302201 is an apocalyptic number.

It is an amenable number.

221302201 is a deficient number, since it is larger than the sum of its proper divisors (3031611).

221302201 is an equidigital number, since it uses as much as digits as its factorization.

221302201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031610.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221302201 is about 14876.2293945744. The cubic root of 221302201 is about 604.8698133010.

Adding to 221302201 its reverse (102203122), we get a palindrome (323505323).

The spelling of 221302201 in words is "two hundred twenty-one million, three hundred two thousand, two hundred one".