2121313113103 has 4 divisors (see below), whose sum is σ = 2122799668920. Its totient is φ = 2119826557288.

The previous prime is 2121313113041. The next prime is 2121313113149. The reversal of 2121313113103 is 3013113131212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121313113103 - 2¹⁷ = 2121312982031 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 (2121313113503) 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, 743275768 + ... + 743278621.

It is an arithmetic number, because the mean of its divisors is an integer number (530699917230).

Almost surely, 2^{2121313113103} is an apocalyptic number.

2121313113103 is a deficient number, since it is larger than the sum of its proper divisors (1486555817).

2121313113103 is a wasteful number, since it uses less digits than its factorization.

2121313113103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486555816.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 2121313113103 its reverse (3013113131212), we get a palindrome (5134426244315).

The spelling of 2121313113103 in words is "two trillion, one hundred twenty-one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred three".