111161114231 has 4 divisors (see below), whose sum is σ = 111174430512. Its totient is φ = 111147797952.

The previous prime is 111161114219. The next prime is 111161114237. The reversal of 111161114231 is 132411161111.

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 111161114231 - 2²² = 111156919927 is a prime.

It is a super-2 number, since 2×111161114231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111161114197 and 111161114206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111161114237) 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, 6645611 + ... + 6662316.

It is an arithmetic number, because the mean of its divisors is an integer number (27793607628).

Almost surely, 2^111161114231 is an apocalyptic number.

111161114231 is a deficient number, since it is larger than the sum of its proper divisors (13316281).

111161114231 is an equidigital number, since it uses as much as digits as its factorization.

111161114231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13316280.

The product of its digits is 144, while the sum is 23.

Adding to 111161114231 its reverse (132411161111), we get a palindrome (243572275342).

The spelling of 111161114231 in words is "one hundred eleven billion, one hundred sixty-one million, one hundred fourteen thousand, two hundred thirty-one".