240030663721 has 2 divisors, whose sum is σ = 240030663722. Its totient is φ = 240030663720.

The previous prime is 240030663707. The next prime is 240030663727. The reversal of 240030663721 is 127366030042.

240030663721 is digitally balanced in base 2, 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., 232675028496 + 7355635225 = 482364^2 + 85765^2 .

It is a cyclic number.

It is not a de Polignac number, because 240030663721 - 2⁵ = 240030663689 is a prime.

It is a super-2 number, since 2×240030663721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240030663727) 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, 120015331860 + 120015331861.

It is an arithmetic number, because the mean of its divisors is an integer number (120015331861).

Almost surely, 2^240030663721 is an apocalyptic number.

It is an amenable number.

240030663721 is a deficient number, since it is larger than the sum of its proper divisors (1).

240030663721 is an equidigital number, since it uses as much as digits as its factorization.

240030663721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 240030663721 its reverse (127366030042), we get a palindrome (367396693763).

The spelling of 240030663721 in words is "two hundred forty billion, thirty million, six hundred sixty-three thousand, seven hundred twenty-one".