13121365003 has 4 divisors (see below), whose sum is σ = 13343761080. Its totient is φ = 12898968928.

The previous prime is 13121364929. The next prime is 13121365039. The reversal of 13121365003 is 30056312131.

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

It is not a de Polignac number, because 13121365003 - 2¹³ = 13121356811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121365303) 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, 111197950 + ... + 111198067.

It is an arithmetic number, because the mean of its divisors is an integer number (3335940270).

Almost surely, 2^13121365003 is an apocalyptic number.

13121365003 is a deficient number, since it is larger than the sum of its proper divisors (222396077).

13121365003 is an equidigital number, since it uses as much as digits as its factorization.

13121365003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222396076.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 13121365003 its reverse (30056312131), we get a palindrome (43177677134).

The spelling of 13121365003 in words is "thirteen billion, one hundred twenty-one million, three hundred sixty-five thousand, three".