1240221404423 has 2 divisors, whose sum is σ = 1240221404424. Its totient is φ = 1240221404422.

The previous prime is 1240221404417. The next prime is 1240221404431. The reversal of 1240221404423 is 3244041220421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240221404423 - 2⁸ = 1240221404167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240221404623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620110702211 + 620110702212.

It is an arithmetic number, because the mean of its divisors is an integer number (620110702212).

Almost surely, 2^{1240221404423} is an apocalyptic number.

1240221404423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240221404423 is an equidigital number, since it uses as much as digits as its factorization.

1240221404423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 1240221404423 its reverse (3244041220421), we get a palindrome (4484262624844).

The spelling of 1240221404423 in words is "one trillion, two hundred forty billion, two hundred twenty-one million, four hundred four thousand, four hundred twenty-three".