11111110019 has 4 divisors (see below), whose sum is σ = 11764704744. Its totient is φ = 10457515296.

The previous prime is 11111110013. The next prime is 11111110033. The reversal of 11111110019 is 91001111111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111110019 is a prime.

It is a super-2 number, since 2×11111110019² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 653594707 = 11111110019 / (1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 0 + 1 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111109979 and 11111110006.

It is not an unprimeable number, because it can be changed into a prime (11111110013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326797337 + ... + 326797370.

It is an arithmetic number, because the mean of its divisors is an integer number (2941176186).

Almost surely, 2^11111110019 is an apocalyptic number.

11111110019 is a deficient number, since it is larger than the sum of its proper divisors (653594725).

11111110019 is an equidigital number, since it uses as much as digits as its factorization.

11111110019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653594724.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11111110019 in words is "eleven billion, one hundred eleven million, one hundred ten thousand, nineteen".