20130121103 has 16 divisors (see below), whose sum is σ = 21282480000. Its totient is φ = 19008901632.

The previous prime is 20130121021. The next prime is 20130121117. The reversal of 20130121103 is 30112103102.

It is a cyclic number.

It is not a de Polignac number, because 20130121103 - 2²⁶ = 20063012239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130121183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2270423 + ... + 2279271.

It is an arithmetic number, because the mean of its divisors is an integer number (1330155000).

Almost surely, 2^20130121103 is an apocalyptic number.

20130121103 is a deficient number, since it is larger than the sum of its proper divisors (1152358897).

20130121103 is a wasteful number, since it uses less digits than its factorization.

20130121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10594.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20130121103 its reverse (30112103102), we get a palindrome (50242224205).

The spelling of 20130121103 in words is "twenty billion, one hundred thirty million, one hundred twenty-one thousand, one hundred three".