13211031121111 has 4 divisors (see below), whose sum is σ = 13273642643224. Its totient is φ = 13148419599000.

The previous prime is 13211031121069. The next prime is 13211031121117. The reversal of 13211031121111 is 11112113011231.

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

It is a cyclic number.

It is not a de Polignac number, because 13211031121111 - 2¹¹ = 13211031119063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211031121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31305760740 + ... + 31305761161.

It is an arithmetic number, because the mean of its divisors is an integer number (3318410660806).

Almost surely, 2^{13211031121111} is an apocalyptic number.

13211031121111 is a deficient number, since it is larger than the sum of its proper divisors (62611522113).

13211031121111 is an equidigital number, since it uses as much as digits as its factorization.

13211031121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62611522112.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 13211031121111 its reverse (11112113011231), we get a palindrome (24323144132342).

The spelling of 13211031121111 in words is "thirteen trillion, two hundred eleven billion, thirty-one million, one hundred twenty-one thousand, one hundred eleven".