281111111112 has 64 divisors (see below), whose sum is σ = 756956148480. Its totient is φ = 86482179072.

The previous prime is 281111111111. The next prime is 281111111159. The reversal of 281111111112 is 211111111182.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (281111111111) 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 in 15 ways as a sum of consecutive naturals, for example, 2024128 + ... + 2158544.

It is an arithmetic number, because the mean of its divisors is an integer number (11827439820).

Almost surely, 2^281111111112 is an apocalyptic number.

It is an amenable number.

281111111112 is an abundant number, since it is smaller than the sum of its proper divisors (475845037368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281111111112 is a wasteful number, since it uses less digits than its factorization.

281111111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141142 (or 141138 counting only the distinct ones).

The product of its digits is 32, while the sum is 21.

Adding to 281111111112 its reverse (211111111182), we get a palindrome (492222222294).

The spelling of 281111111112 in words is "two hundred eighty-one billion, one hundred eleven million, one hundred eleven thousand, one hundred twelve".