21313112103 has 6 divisors (see below), whose sum is σ = 30785606384. Its totient is φ = 14208741396.

The previous prime is 21313112099. The next prime is 21313112147. The reversal of 21313112103 is 30121131312.

It is not a de Polignac number, because 21313112103 - 2² = 21313112099 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 (21313112903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184061775 + ... + 1184061792.

Almost surely, 2^21313112103 is an apocalyptic number.

21313112103 is a deficient number, since it is larger than the sum of its proper divisors (9472494281).

21313112103 is a wasteful number, since it uses less digits than its factorization.

21313112103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368123573 (or 2368123570 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21313112103 its reverse (30121131312), we get a palindrome (51434243415).

The spelling of 21313112103 in words is "twenty-one billion, three hundred thirteen million, one hundred twelve thousand, one hundred three".