8101111019 has 4 divisors (see below), whose sum is σ = 8124060696. Its totient is φ = 8078161344.

The previous prime is 8101111013. The next prime is 8101111063. The reversal of 8101111019 is 9101111018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8101111019 - 2³² = 3806143723 is a prime.

It is a super-2 number, since 2×8101111019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8101110985 and 8101111003.

It is not an unprimeable number, because it can be changed into a prime (8101111013) 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 3 ways as a sum of consecutive naturals, for example, 11474309 + ... + 11475014.

It is an arithmetic number, because the mean of its divisors is an integer number (2031015174).

Almost surely, 2^8101111019 is an apocalyptic number.

8101111019 is a deficient number, since it is larger than the sum of its proper divisors (22949677).

8101111019 is a wasteful number, since it uses less digits than its factorization.

8101111019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22949676.

The product of its (nonzero) digits is 72, while the sum is 23.

The square root of 8101111019 is about 90006.1721161388. The cubic root of 8101111019 is about 2008.3906673730.

Subtracting 8101111019 from its reverse (9101111018), we obtain a palindrome (999999999).

The spelling of 8101111019 in words is "eight billion, one hundred one million, one hundred eleven thousand, nineteen".