81114111 has 12 divisors (see below), whose sum is σ = 126177688. Its totient is φ = 49916304.

The previous prime is 81114091. The next prime is 81114127. The reversal of 81114111 is 11141118.

It is a happy number.

It is not a de Polignac number, because 81114111 - 2²² = 76919807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81114161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346525 + ... + 346758.

Almost surely, 2^81114111 is an apocalyptic number.

81114111 is a deficient number, since it is larger than the sum of its proper divisors (45063577).

81114111 is a wasteful number, since it uses less digits than its factorization.

81114111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693302 (or 693299 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

The square root of 81114111 is about 9006.3372688347. The cubic root of 81114111 is about 432.8779566690.

Adding to 81114111 its reverse (11141118), we get a palindrome (92255229).

It can be divided in two parts, 81114 and 111, that added together give a square (81225 = 285²).

The spelling of 81114111 in words is "eighty-one million, one hundred fourteen thousand, one hundred eleven".