2013130121 has 4 divisors (see below), whose sum is σ = 2017085700. Its totient is φ = 2009174544.

The previous prime is 2013130109. The next prime is 2013130127. The reversal of 2013130121 is 1210313102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1725488521 + 287641600 = 41539^2 + 16960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013130121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2013130096 and 2013130105.

It is not an unprimeable number, because it can be changed into a prime (2013130127) 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, 1977026 + ... + 1978043.

It is an arithmetic number, because the mean of its divisors is an integer number (504271425).

Almost surely, 2^2013130121 is an apocalyptic number.

It is an amenable number.

2013130121 is a deficient number, since it is larger than the sum of its proper divisors (3955579).

2013130121 is an equidigital number, since it uses as much as digits as its factorization.

2013130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955578.

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

The square root of 2013130121 is about 44867.9186167578. The cubic root of 2013130121 is about 1262.6721908198.

Adding to 2013130121 its reverse (1210313102), we get a palindrome (3223443223).

The spelling of 2013130121 in words is "two billion, thirteen million, one hundred thirty thousand, one hundred twenty-one".