221122201 has 4 divisors (see below), whose sum is σ = 225294372. Its totient is φ = 216950032.

The previous prime is 221122193. The next prime is 221122259. The reversal of 221122201 is 102221122.

It is a happy number.

221122201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 95570176 + 125552025 = 9776^2 + 11205^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122201 - 2³ = 221122193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122261) 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, 2086006 + ... + 2086111.

It is an arithmetic number, because the mean of its divisors is an integer number (56323593).

Almost surely, 2^221122201 is an apocalyptic number.

It is an amenable number.

221122201 is a deficient number, since it is larger than the sum of its proper divisors (4172171).

221122201 is an equidigital number, since it uses as much as digits as its factorization.

221122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172170.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221122201 is about 14870.1782437199. The cubic root of 221122201 is about 604.7057750190.

Adding to 221122201 its reverse (102221122), we get a palindrome (323343323).

The spelling of 221122201 in words is "two hundred twenty-one million, one hundred twenty-two thousand, two hundred one".