111331121111 has 8 divisors (see below), whose sum is σ = 127242706944. Its totient is φ = 95421320280.

The previous prime is 111331121101. The next prime is 111331121117. The reversal of 111331121111 is 111121133111.

It is a happy number.

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 111331121111 - 2⁶ = 111331121047 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 111331121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111331121117) 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, 309815 + ... + 564488.

It is an arithmetic number, because the mean of its divisors is an integer number (15905338368).

Almost surely, 2^111331121111 is an apocalyptic number.

111331121111 is a deficient number, since it is larger than the sum of its proper divisors (15911585833).

111331121111 is an equidigital number, since it uses as much as digits as its factorization.

111331121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892501.

The product of its digits is 18, while the sum is 17.

Adding to 111331121111 its reverse (111121133111), we get a palindrome (222452254222).

The spelling of 111331121111 in words is "one hundred eleven billion, three hundred thirty-one million, one hundred twenty-one thousand, one hundred eleven".