13431310121 has 4 divisors (see below), whose sum is σ = 14138221200. Its totient is φ = 12724399044.

The previous prime is 13431310103. The next prime is 13431310147. The reversal of 13431310121 is 12101313431.

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.

It is a cyclic number.

It is not a de Polignac number, because 13431310121 - 2²² = 13427115817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13431310093 and 13431310102.

It is not an unprimeable number, because it can be changed into a prime (13439310121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353455511 + ... + 353455548.

It is an arithmetic number, because the mean of its divisors is an integer number (3534555300).

Almost surely, 2^13431310121 is an apocalyptic number.

It is an amenable number.

13431310121 is a deficient number, since it is larger than the sum of its proper divisors (706911079).

13431310121 is an equidigital number, since it uses as much as digits as its factorization.

13431310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706911078.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13431310121 its reverse (12101313431), we get a palindrome (25532623552).

The spelling of 13431310121 in words is "thirteen billion, four hundred thirty-one million, three hundred ten thousand, one hundred twenty-one".