2103121013 has 36 divisors (see below), whose sum is σ = 2537831520. Its totient is φ = 1737617616.

The previous prime is 2103120937. The next prime is 2103121043. The reversal of 2103121013 is 3101213012.

It is not a de Polignac number, because 2103121013 - 2¹⁸ = 2102858869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103121043) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12593456 + ... + 12593622.

It is an arithmetic number, because the mean of its divisors is an integer number (70495320).

Almost surely, 2^2103121013 is an apocalyptic number.

It is an amenable number.

2103121013 is a deficient number, since it is larger than the sum of its proper divisors (434710507).

2103121013 is a wasteful number, since it uses less digits than its factorization.

2103121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 356 counting only the distinct ones).

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

The square root of 2103121013 is about 45859.7973501846. The cubic root of 2103121013 is about 1281.2132484624.

Adding to 2103121013 its reverse (3101213012), we get a palindrome (5204334025).

The spelling of 2103121013 in words is "two billion, one hundred three million, one hundred twenty-one thousand, thirteen".