111678394231 has 2 divisors, whose sum is σ = 111678394232. Its totient is φ = 111678394230.

The previous prime is 111678394171. The next prime is 111678394259. The reversal of 111678394231 is 132493876111.

It is a strong prime.

It is an emirp because it is prime and its reverse (132493876111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111678394231 - 2¹¹ = 111678392183 is a prime.

It is a super-2 number, since 2×111678394231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111678394271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55839197115 + 55839197116.

It is an arithmetic number, because the mean of its divisors is an integer number (55839197116).

Almost surely, 2^111678394231 is an apocalyptic number.

111678394231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111678394231 is an equidigital number, since it uses as much as digits as its factorization.

111678394231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The spelling of 111678394231 in words is "one hundred eleven billion, six hundred seventy-eight million, three hundred ninety-four thousand, two hundred thirty-one".