20031203123123 has 4 divisors (see below), whose sum is σ = 20158790404320. Its totient is φ = 19903615841928.

The previous prime is 20031203123089. The next prime is 20031203123147. The reversal of 20031203123123 is 32132130213002.

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 20031203123123 - 2³⁰ = 20030129381299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031203123023) 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, 63793640363 + ... + 63793640676.

It is an arithmetic number, because the mean of its divisors is an integer number (5039697601080).

Almost surely, 2^{20031203123123} is an apocalyptic number.

20031203123123 is a deficient number, since it is larger than the sum of its proper divisors (127587281197).

20031203123123 is a wasteful number, since it uses less digits than its factorization.

20031203123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127587281196.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20031203123123 its reverse (32132130213002), we get a palindrome (52163333336125).

The spelling of 20031203123123 in words is "twenty trillion, thirty-one billion, two hundred three million, one hundred twenty-three thousand, one hundred twenty-three".