123405205133 has 8 divisors (see below), whose sum is σ = 141040354368. Its totient is φ = 105771514464.

The previous prime is 123405205069. The next prime is 123405205207. The reversal of 123405205133 is 331502504321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123405205133 - 2⁶ = 123405205069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123405205096 and 123405205105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405205633) 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 in 7 ways as a sum of consecutive naturals, for example, 176891 + ... + 527352.

It is an arithmetic number, because the mean of its divisors is an integer number (17630044296).

Almost surely, 2^123405205133 is an apocalyptic number.

It is an amenable number.

123405205133 is a deficient number, since it is larger than the sum of its proper divisors (17635149235).

123405205133 is an equidigital number, since it uses as much as digits as its factorization.

123405205133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729283.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 123405205133 its reverse (331502504321), we get a palindrome (454907709454).

The spelling of 123405205133 in words is "one hundred twenty-three billion, four hundred five million, two hundred five thousand, one hundred thirty-three".