13210221121 has 4 divisors (see below), whose sum is σ = 13211804592. Its totient is φ = 13208637652.

The previous prime is 13210221091. The next prime is 13210221149. The reversal of 13210221121 is 12112201231.

13210221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13210221121 - 2⁹ = 13210220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13210221095 and 13210221104.

It is not an unprimeable number, because it can be changed into a prime (13210221191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779155 + ... + 795928.

It is an arithmetic number, because the mean of its divisors is an integer number (3302951148).

Almost surely, 2^13210221121 is an apocalyptic number.

It is an amenable number.

13210221121 is a deficient number, since it is larger than the sum of its proper divisors (1583471).

13210221121 is an equidigital number, since it uses as much as digits as its factorization.

13210221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583470.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13210221121 its reverse (12112201231), we get a palindrome (25322422352).

The spelling of 13210221121 in words is "thirteen billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".