13111321111 has 8 divisors (see below), whose sum is σ = 15865800480. Its totient is φ = 10577200128.

The previous prime is 13111321103. The next prime is 13111321159. The reversal of 13111321111 is 11112311131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13111321111 - 2³ = 13111321103 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 (13111327111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55089466 + ... + 55089703.

It is an arithmetic number, because the mean of its divisors is an integer number (1983225060).

Almost surely, 2^13111321111 is an apocalyptic number.

13111321111 is a deficient number, since it is larger than the sum of its proper divisors (2754479369).

13111321111 is a wasteful number, since it uses less digits than its factorization.

13111321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110179193.

The product of its digits is 18, while the sum is 16.

Adding to 13111321111 its reverse (11112311131), we get a palindrome (24223632242).

The spelling of 13111321111 in words is "thirteen billion, one hundred eleven million, three hundred twenty-one thousand, one hundred eleven".