13323121211 has 4 divisors (see below), whose sum is σ = 13337280624. Its totient is φ = 13308961800.

The previous prime is 13323121181. The next prime is 13323121237. The reversal of 13323121211 is 11212132331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13323121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13323121811) 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, 7078295 + ... + 7080176.

It is an arithmetic number, because the mean of its divisors is an integer number (3334320156).

Almost surely, 2^13323121211 is an apocalyptic number.

13323121211 is a deficient number, since it is larger than the sum of its proper divisors (14159413).

13323121211 is an equidigital number, since it uses as much as digits as its factorization.

13323121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14159412.

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

Adding to 13323121211 its reverse (11212132331), we get a palindrome (24535253542).

The spelling of 13323121211 in words is "thirteen billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred eleven".