20123123110133 has 4 divisors (see below), whose sum is σ = 20227387996908. Its totient is φ = 20018858223360.

The previous prime is 20123123110127. The next prime is 20123123110169. The reversal of 20123123110133 is 33101132132102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6026229606244 + 14096893503889 = 2454838^2 + 3754583^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123123110133 - 2¹⁰ = 20123123109109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123123110099 and 20123123110108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123123110183) 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 3 ways as a sum of consecutive naturals, for example, 52132443098 + ... + 52132443483.

It is an arithmetic number, because the mean of its divisors is an integer number (5056846999227).

Almost surely, 2^{20123123110133} is an apocalyptic number.

It is an amenable number.

20123123110133 is a deficient number, since it is larger than the sum of its proper divisors (104264886775).

20123123110133 is a wasteful number, since it uses less digits than its factorization.

20123123110133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104264886774.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20123123110133 its reverse (33101132132102), we get a palindrome (53224255242235).

The spelling of 20123123110133 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-three million, one hundred ten thousand, one hundred thirty-three".