13311321121 has 4 divisors (see below), whose sum is σ = 15212938432. Its totient is φ = 11409703812.

The previous prime is 13311321103. The next prime is 13311321143. The reversal of 13311321121 is 12112311331.

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: 12112311331 = 499 ⋅24273169.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13311321121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13311321421) 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, 950808645 + ... + 950808658.

It is an arithmetic number, because the mean of its divisors is an integer number (3803234608).

Almost surely, 2^13311321121 is an apocalyptic number.

It is an amenable number.

13311321121 is a deficient number, since it is larger than the sum of its proper divisors (1901617311).

13311321121 is an equidigital number, since it uses as much as digits as its factorization.

13311321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901617310.

The product of its digits is 108, while the sum is 19.

Adding to 13311321121 its reverse (12112311331), we get a palindrome (25423632452).

The spelling of 13311321121 in words is "thirteen billion, three hundred eleven million, three hundred twenty-one thousand, one hundred twenty-one".