40243412123 has 2 divisors, whose sum is σ = 40243412124. Its totient is φ = 40243412122.

The previous prime is 40243412093. The next prime is 40243412149. The reversal of 40243412123 is 32121434204.

It is an a-pointer prime, because the next prime (40243412149) can be obtained adding 40243412123 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40243412123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40243412092 and 40243412101.

It is not a weakly prime, because it can be changed into another prime (40243412173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121706061 + 20121706062.

It is an arithmetic number, because the mean of its divisors is an integer number (20121706062).

Almost surely, 2^40243412123 is an apocalyptic number.

40243412123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243412123 is an equidigital number, since it uses as much as digits as its factorization.

40243412123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 40243412123 its reverse (32121434204), we get a palindrome (72364846327).

The spelling of 40243412123 in words is "forty billion, two hundred forty-three million, four hundred twelve thousand, one hundred twenty-three".