13121320303 has 12 divisors (see below), whose sum is σ = 16437698760. Its totient is φ = 10381703472.

The previous prime is 13121320253. The next prime is 13121320313. The reversal of 13121320303 is 30302312131.

It is not a de Polignac number, because 13121320303 - 2¹³ = 13121312111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121320313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10298673 + ... + 10299946.

It is an arithmetic number, because the mean of its divisors is an integer number (1369808230).

Almost surely, 2^13121320303 is an apocalyptic number.

13121320303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13121320303 is a deficient number, since it is larger than the sum of its proper divisors (3316378457).

13121320303 is a wasteful number, since it uses less digits than its factorization.

13121320303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20598646 (or 20598639 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13121320303 its reverse (30302312131), we get a palindrome (43423632434).

The spelling of 13121320303 in words is "thirteen billion, one hundred twenty-one million, three hundred twenty thousand, three hundred three".