111131320111 has 4 divisors (see below), whose sum is σ = 127007222992. Its totient is φ = 95255417232.

The previous prime is 111131320049. The next prime is 111131320147. The reversal of 111131320111 is 111023131111.

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 111131320111 - 2³¹ = 108983836463 is a prime.

It is a super-2 number, since 2×111131320111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131320171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7937951430 + ... + 7937951443.

It is an arithmetic number, because the mean of its divisors is an integer number (31751805748).

Almost surely, 2^111131320111 is an apocalyptic number.

111131320111 is a deficient number, since it is larger than the sum of its proper divisors (15875902881).

111131320111 is an equidigital number, since it uses as much as digits as its factorization.

111131320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15875902880.

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

Adding to 111131320111 its reverse (111023131111), we get a palindrome (222154451222).

The spelling of 111131320111 in words is "one hundred eleven billion, one hundred thirty-one million, three hundred twenty thousand, one hundred eleven".