13121303103 has 64 divisors (see below), whose sum is σ = 21223520640. Its totient is φ = 7979212800.

The previous prime is 13121303101. The next prime is 13121303123. The reversal of 13121303103 is 30130312131.

It is a happy number.

It is not a de Polignac number, because 13121303103 - 2¹ = 13121303101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121303101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2952363 + ... + 2956803.

It is an arithmetic number, because the mean of its divisors is an integer number (331617510).

Almost surely, 2^13121303103 is an apocalyptic number.

13121303103 is a deficient number, since it is larger than the sum of its proper divisors (8102217537).

13121303103 is a wasteful number, since it uses less digits than its factorization.

13121303103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665 (or 4659 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 13121303103 its reverse (30130312131), we get a palindrome (43251615234).

The spelling of 13121303103 in words is "thirteen billion, one hundred twenty-one million, three hundred three thousand, one hundred three".