13211321111 has 4 divisors (see below), whose sum is σ = 13215415800. Its totient is φ = 13207226424.

The previous prime is 13211321107. The next prime is 13211321131. The reversal of 13211321111 is 11112311231.

13211321111 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 an emirpimes, since its reverse is a distinct semiprime: 11112311231 = 7 ⋅1587473033.

It is a cyclic number.

It is not a de Polignac number, because 13211321111 - 2² = 13211321107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13211321111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211321131) 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, 2042501 + ... + 2048958.

It is an arithmetic number, because the mean of its divisors is an integer number (3303853950).

Almost surely, 2^13211321111 is an apocalyptic number.

13211321111 is a deficient number, since it is larger than the sum of its proper divisors (4094689).

13211321111 is an equidigital number, since it uses as much as digits as its factorization.

13211321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094688.

The product of its digits is 36, while the sum is 17.

Adding to 13211321111 its reverse (11112311231), we get a palindrome (24323632342).

The spelling of 13211321111 in words is "thirteen billion, two hundred eleven million, three hundred twenty-one thousand, one hundred eleven".