13133221121 has 4 divisors (see below), whose sum is σ = 13438644912. Its totient is φ = 12827797332.

The previous prime is 13133221093. The next prime is 13133221133. The reversal of 13133221121 is 12112233131.

It is a happy number.

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: 12112233131 = 55799 ⋅217069.

It is a cyclic number.

It is not a de Polignac number, because 13133221121 - 2³⁰ = 12059479297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13133221093 and 13133221102.

It is not an unprimeable number, because it can be changed into a prime (13133221141) 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, 152711831 + ... + 152711916.

It is an arithmetic number, because the mean of its divisors is an integer number (3359661228).

Almost surely, 2^13133221121 is an apocalyptic number.

It is an amenable number.

13133221121 is a deficient number, since it is larger than the sum of its proper divisors (305423791).

13133221121 is an equidigital number, since it uses as much as digits as its factorization.

13133221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305423790.

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

Adding to 13133221121 its reverse (12112233131), we get a palindrome (25245454252).

The spelling of 13133221121 in words is "thirteen billion, one hundred thirty-three million, two hundred twenty-one thousand, one hundred twenty-one".