20124011123 has 4 divisors (see below), whose sum is σ = 20124356280. Its totient is φ = 20123665968.

The previous prime is 20124011111. The next prime is 20124011143. The reversal of 20124011123 is 32111042102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32111042102 = 2 ⋅16055521051.

It is a cyclic number.

It is not a de Polignac number, because 20124011123 - 2¹⁶ = 20123945587 is a prime.

It is a super-2 number, since 2×20124011123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124011143) 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, 61133 + ... + 209726.

It is an arithmetic number, because the mean of its divisors is an integer number (5031089070).

Almost surely, 2^20124011123 is an apocalyptic number.

20124011123 is a deficient number, since it is larger than the sum of its proper divisors (345157).

20124011123 is an equidigital number, since it uses as much as digits as its factorization.

20124011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345156.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20124011123 its reverse (32111042102), we get a palindrome (52235053225).

The spelling of 20124011123 in words is "twenty billion, one hundred twenty-four million, eleven thousand, one hundred twenty-three".