201440221 has 2 divisors, whose sum is σ = 201440222. Its totient is φ = 201440220.

The previous prime is 201440209. The next prime is 201440231. The reversal of 201440221 is 122044102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107931321 + 93508900 = 10389^2 + 9670^2 .

It is a cyclic number.

It is not a de Polignac number, because 201440221 - 2¹¹ = 201438173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201440195 and 201440204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201440231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100720110 + 100720111.

It is an arithmetic number, because the mean of its divisors is an integer number (100720111).

Almost surely, 2^201440221 is an apocalyptic number.

It is an amenable number.

201440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201440221 is an equidigital number, since it uses as much as digits as its factorization.

201440221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 201440221 is about 14192.9637849182. The cubic root of 201440221 is about 586.2039354728.

Adding to 201440221 its reverse (122044102), we get a palindrome (323484323).

The spelling of 201440221 in words is "two hundred one million, four hundred forty thousand, two hundred twenty-one".