4243411440421 has 2 divisors, whose sum is σ = 4243411440422. Its totient is φ = 4243411440420.

The previous prime is 4243411440379. The next prime is 4243411440439. The reversal of 4243411440421 is 1240441143424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2477066776900 + 1766344663521 = 1573870^2 + 1329039^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243411440421 - 2²⁹ = 4242874569509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243411440481) 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, 2121705720210 + 2121705720211.

It is an arithmetic number, because the mean of its divisors is an integer number (2121705720211).

Almost surely, 2^{4243411440421} is an apocalyptic number.

It is an amenable number.

4243411440421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243411440421 is an equidigital number, since it uses as much as digits as its factorization.

4243411440421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 34.

Adding to 4243411440421 its reverse (1240441143424), we get a palindrome (5483852583845).

The spelling of 4243411440421 in words is "four trillion, two hundred forty-three billion, four hundred eleven million, four hundred forty thousand, four hundred twenty-one".