4040511221 has 2 divisors, whose sum is σ = 4040511222. Its totient is φ = 4040511220.

The previous prime is 4040511187. The next prime is 4040511247. The reversal of 4040511221 is 1221150404.

It is a happy number.

4040511221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3955152100 + 85359121 = 62890^2 + 9239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040511221 - 2⁶ = 4040511157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4040511193 and 4040511202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040511121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020255610 + 2020255611.

It is an arithmetic number, because the mean of its divisors is an integer number (2020255611).

Almost surely, 2^4040511221 is an apocalyptic number.

It is an amenable number.

4040511221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040511221 is an equidigital number, since it uses as much as digits as its factorization.

4040511221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4040511221 is about 63565.0157004622. The cubic root of 4040511221 is about 1592.7420244707.

Adding to 4040511221 its reverse (1221150404), we get a palindrome (5261661625).

The spelling of 4040511221 in words is "four billion, forty million, five hundred eleven thousand, two hundred twenty-one".