20003122123 has 4 divisors (see below), whose sum is σ = 20024380368. Its totient is φ = 19981863880.

The previous prime is 20003122091. The next prime is 20003122129. The reversal of 20003122123 is 32122130002.

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 20003122123 - 2⁵ = 20003122091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003122097 and 20003122106.

It is not an unprimeable number, because it can be changed into a prime (20003122129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10627711 + ... + 10629592.

It is an arithmetic number, because the mean of its divisors is an integer number (5006095092).

Almost surely, 2^20003122123 is an apocalyptic number.

20003122123 is a deficient number, since it is larger than the sum of its proper divisors (21258245).

20003122123 is an equidigital number, since it uses as much as digits as its factorization.

20003122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21258244.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20003122123 its reverse (32122130002), we get a palindrome (52125252125).

The spelling of 20003122123 in words is "twenty billion, three million, one hundred twenty-two thousand, one hundred twenty-three".