20103231123 has 6 divisors (see below), whose sum is σ = 29038000524. Its totient is φ = 13402154076.

The previous prime is 20103231107. The next prime is 20103231133. The reversal of 20103231123 is 32113230102.

It is not a de Polignac number, because 20103231123 - 2⁴ = 20103231107 is a prime.

It is a super-2 number, since 2×20103231123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20103231096 and 20103231105.

It is not an unprimeable number, because it can be changed into a prime (20103231133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1116846165 + ... + 1116846182.

It is an arithmetic number, because the mean of its divisors is an integer number (4839666754).

Almost surely, 2^20103231123 is an apocalyptic number.

20103231123 is a deficient number, since it is larger than the sum of its proper divisors (8934769401).

20103231123 is a wasteful number, since it uses less digits than its factorization.

20103231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233692353 (or 2233692350 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20103231123 its reverse (32113230102), we get a palindrome (52216461225).

The spelling of 20103231123 in words is "twenty billion, one hundred three million, two hundred thirty-one thousand, one hundred twenty-three".