2013121103 has 16 divisors (see below), whose sum is σ = 2326566720. Its totient is φ = 1706213376.

The previous prime is 2013121087. The next prime is 2013121111. The reversal of 2013121103 is 3011213102.

It is not a de Polignac number, because 2013121103 - 2⁴ = 2013121087 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 (2013121163) 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, 358703 + ... + 364271.

It is an arithmetic number, because the mean of its divisors is an integer number (145410420).

Almost surely, 2^2013121103 is an apocalyptic number.

2013121103 is a deficient number, since it is larger than the sum of its proper divisors (313445617).

2013121103 is a wasteful number, since it uses less digits than its factorization.

2013121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6146.

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

The square root of 2013121103 is about 44867.8181216783. The cubic root of 2013121103 is about 1262.6703053986.

Adding to 2013121103 its reverse (3011213102), we get a palindrome (5024334205).

The spelling of 2013121103 in words is "two billion, thirteen million, one hundred twenty-one thousand, one hundred three".