4000204848721 has 2 divisors, whose sum is σ = 4000204848722. Its totient is φ = 4000204848720.

The previous prime is 4000204848637. The next prime is 4000204848733. The reversal of 4000204848721 is 1278484020004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2064667241025 + 1935537607696 = 1436895^2 + 1391236^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000204848721 - 2⁹ = 4000204848209 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000204848751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000102424360 + 2000102424361.

It is an arithmetic number, because the mean of its divisors is an integer number (2000102424361).

Almost surely, 2^{4000204848721} is an apocalyptic number.

It is an amenable number.

4000204848721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000204848721 is an equidigital number, since it uses as much as digits as its factorization.

4000204848721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114688, while the sum is 40.

Adding to 4000204848721 its reverse (1278484020004), we get a palindrome (5278688868725).

The spelling of 4000204848721 in words is "four trillion, two hundred four million, eight hundred forty-eight thousand, seven hundred twenty-one".