201230221 has 4 divisors (see below), whose sum is σ = 201732444. Its totient is φ = 200728000.

The previous prime is 201230219. The next prime is 201230291. The reversal of 201230221 is 122032102.

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 153412996 + 47817225 = 12386^2 + 6915^2 .

It is a cyclic number.

It is not a de Polignac number, because 201230221 - 2¹ = 201230219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201230291) 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, 250510 + ... + 251311.

It is an arithmetic number, because the mean of its divisors is an integer number (50433111).

Almost surely, 2^201230221 is an apocalyptic number.

It is an amenable number.

201230221 is a deficient number, since it is larger than the sum of its proper divisors (502223).

201230221 is an equidigital number, since it uses as much as digits as its factorization.

201230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502222.

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

The square root of 201230221 is about 14185.5638238316. The cubic root of 201230221 is about 586.0001601649. Note that the first 3 decimals are identical.

Adding to 201230221 its reverse (122032102), we get a palindrome (323262323).

The spelling of 201230221 in words is "two hundred one million, two hundred thirty thousand, two hundred twenty-one".