110000809981 has 2 divisors, whose sum is σ = 110000809982. Its totient is φ = 110000809980.

The previous prime is 110000809979. The next prime is 110000810021. The reversal of 110000809981 is 189908000011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85761122500 + 24239687481 = 292850^2 + 155691^2 .

It is an emirp because it is prime and its reverse (189908000011) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 186608000011 and 110000806681.

It is a cyclic number.

It is not a de Polignac number, because 110000809981 - 2¹ = 110000809979 is a prime.

It is a super-2 number, since 2×110000809981² (a number of 23 digits) contains 22 as substring.

Together with 110000809979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 110000809981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110000809951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000404990 + 55000404991.

It is an arithmetic number, because the mean of its divisors is an integer number (55000404991).

Almost surely, 2^110000809981 is an apocalyptic number.

It is an amenable number.

110000809981 is a deficient number, since it is larger than the sum of its proper divisors (1).

110000809981 is an equidigital number, since it uses as much as digits as its factorization.

110000809981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

Adding to 110000809981 its reverse (189908000011), we get a palindrome (299908809992).

The spelling of 110000809981 in words is "one hundred ten billion, eight hundred nine thousand, nine hundred eighty-one".