13121310311103 has 16 divisors (see below), whose sum is σ = 18195417232256. Its totient is φ = 8404041673440.

The previous prime is 13121310311099. The next prime is 13121310311113. The reversal of 13121310311103 is 30111301312131.

It is not a de Polignac number, because 13121310311103 - 2² = 13121310311099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13121310311103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121310311113) 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, 833726425 + ... + 833742162.

It is an arithmetic number, because the mean of its divisors is an integer number (1137213577016).

Almost surely, 2^{13121310311103} is an apocalyptic number.

13121310311103 is a deficient number, since it is larger than the sum of its proper divisors (5074106921153).

13121310311103 is a wasteful number, since it uses less digits than its factorization.

13121310311103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667468694.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 13121310311103 its reverse (30111301312131), we get a palindrome (43232611623234).

The spelling of 13121310311103 in words is "thirteen trillion, one hundred twenty-one billion, three hundred ten million, three hundred eleven thousand, one hundred three".