11131331111 has 8 divisors (see below), whose sum is σ = 11985881040. Its totient is φ = 10298977408.

The previous prime is 11131331047. The next prime is 11131331129. The reversal of 11131331111 is 11113313111.

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 11131331111 - 2⁶ = 11131331047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 11131331111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131331131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5548016 + ... + 5550021.

It is an arithmetic number, because the mean of its divisors is an integer number (1498235130).

Almost surely, 2^11131331111 is an apocalyptic number.

11131331111 is a deficient number, since it is larger than the sum of its proper divisors (854549929).

11131331111 is a wasteful number, since it uses less digits than its factorization.

11131331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11098113.

The product of its digits is 27, while the sum is 17.

Adding to 11131331111 its reverse (11113313111), we get a palindrome (22244644222).

The spelling of 11131331111 in words is "eleven billion, one hundred thirty-one million, three hundred thirty-one thousand, one hundred eleven".