240400110221 has 2 divisors, whose sum is σ = 240400110222. Its totient is φ = 240400110220.

The previous prime is 240400110179. The next prime is 240400110227. The reversal of 240400110221 is 122011004042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216796396996 + 23603713225 = 465614^2 + 153635^2 .

It is a cyclic number.

It is not a de Polignac number, because 240400110221 - 2¹⁰ = 240400109197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 240400110221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240400110227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120200055110 + 120200055111.

It is an arithmetic number, because the mean of its divisors is an integer number (120200055111).

Almost surely, 2^240400110221 is an apocalyptic number.

It is an amenable number.

240400110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

240400110221 is an equidigital number, since it uses as much as digits as its factorization.

240400110221 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 17.

Adding to 240400110221 its reverse (122011004042), we get a palindrome (362411114263).

The spelling of 240400110221 in words is "two hundred forty billion, four hundred million, one hundred ten thousand, two hundred twenty-one".