111109967231 has 2 divisors, whose sum is σ = 111109967232. Its totient is φ = 111109967230.

The previous prime is 111109967161. The next prime is 111109967233. The reversal of 111109967231 is 132769901111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111109967231 is a prime.

It is a super-2 number, since 2×111109967231² (a number of 23 digits) contains 22 as substring.

Together with 111109967233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111109967233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55554983615 + 55554983616.

It is an arithmetic number, because the mean of its divisors is an integer number (55554983616).

Almost surely, 2^111109967231 is an apocalyptic number.

111109967231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111109967231 is an equidigital number, since it uses as much as digits as its factorization.

111109967231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 111109967231 in words is "one hundred eleven billion, one hundred nine million, nine hundred sixty-seven thousand, two hundred thirty-one".