4040403242221 has 2 divisors, whose sum is σ = 4040403242222. Its totient is φ = 4040403242220.

The previous prime is 4040403242219. The next prime is 4040403242231. The reversal of 4040403242221 is 1222423040404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3978409214025 + 61994028196 = 1994595^2 + 248986^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040403242221 - 2¹ = 4040403242219 is a prime.

Together with 4040403242219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4040403242221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040403242231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020201621110 + 2020201621111.

It is an arithmetic number, because the mean of its divisors is an integer number (2020201621111).

Almost surely, 2^{4040403242221} is an apocalyptic number.

It is an amenable number.

4040403242221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040403242221 is an equidigital number, since it uses as much as digits as its factorization.

4040403242221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 4040403242221 its reverse (1222423040404), we get a palindrome (5262826282625).

The spelling of 4040403242221 in words is "four trillion, forty billion, four hundred three million, two hundred forty-two thousand, two hundred twenty-one".