11405513123 has 2 divisors, whose sum is σ = 11405513124. Its totient is φ = 11405513122.

The previous prime is 11405513117. The next prime is 11405513191. The reversal of 11405513123 is 32131550411.

11405513123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11405513123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11405513092 and 11405513101.

It is not a weakly prime, because it can be changed into another prime (11405513423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5702756561 + 5702756562.

It is an arithmetic number, because the mean of its divisors is an integer number (5702756562).

Almost surely, 2^11405513123 is an apocalyptic number.

11405513123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11405513123 is an equidigital number, since it uses as much as digits as its factorization.

11405513123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 11405513123 in words is "eleven billion, four hundred five million, five hundred thirteen thousand, one hundred twenty-three".