10011911111 has 2 divisors, whose sum is σ = 10011911112. Its totient is φ = 10011911110.

The previous prime is 10011911101. The next prime is 10011911123. The reversal of 10011911111 is 11111911001.

It is a weak prime.

It is an emirp because it is prime and its reverse (11111911001) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 11111611001 and 10011611111.

It is a cyclic number.

It is not a de Polignac number, because 10011911111 - 2²⁶ = 9944802247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10011911111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011911101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005955555 + 5005955556.

It is an arithmetic number, because the mean of its divisors is an integer number (5005955556).

Almost surely, 2^10011911111 is an apocalyptic number.

10011911111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011911111 is an equidigital number, since it uses as much as digits as its factorization.

10011911111 is an evil number, because the sum of its binary digits is even.

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

The spelling of 10011911111 in words is "ten billion, eleven million, nine hundred eleven thousand, one hundred eleven".