13315342121 has 4 divisors (see below), whose sum is σ = 13321736592. Its totient is φ = 13308947652.

The previous prime is 13315342087. The next prime is 13315342127. The reversal of 13315342121 is 12124351331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12124351331 = 29131 ⋅416201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13315342121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13315342127) 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, 3194111 + ... + 3198276.

It is an arithmetic number, because the mean of its divisors is an integer number (3330434148).

Almost surely, 2^13315342121 is an apocalyptic number.

It is an amenable number.

13315342121 is a deficient number, since it is larger than the sum of its proper divisors (6394471).

13315342121 is an equidigital number, since it uses as much as digits as its factorization.

13315342121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394470.

The product of its digits is 2160, while the sum is 26.

Adding to 13315342121 its reverse (12124351331), we get a palindrome (25439693452).

The spelling of 13315342121 in words is "thirteen billion, three hundred fifteen million, three hundred forty-two thousand, one hundred twenty-one".