20124120011123 has 4 divisors (see below), whose sum is σ = 20139285136800. Its totient is φ = 20108954885448.

The previous prime is 20124120011117. The next prime is 20124120011227. The reversal of 20124120011123 is 32111002142102.

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

It is a cyclic number.

It is not a de Polignac number, because 20124120011123 - 2⁶ = 20124120011059 is a prime.

It is a super-2 number, since 2×20124120011123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20124120011095 and 20124120011104.

It is not an unprimeable number, because it can be changed into a prime (20124120017123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7582560848 + ... + 7582563501.

It is an arithmetic number, because the mean of its divisors is an integer number (5034821284200).

Almost surely, 2^{20124120011123} is an apocalyptic number.

20124120011123 is a deficient number, since it is larger than the sum of its proper divisors (15165125677).

20124120011123 is a wasteful number, since it uses less digits than its factorization.

20124120011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15165125676.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20124120011123 its reverse (32111002142102), we get a palindrome (52235122153225).

The spelling of 20124120011123 in words is "twenty trillion, one hundred twenty-four billion, one hundred twenty million, eleven thousand, one hundred twenty-three".