1011110111111 has 4 divisors (see below), whose sum is σ = 1011113114424. Its totient is φ = 1011107107800.

The previous prime is 1011110111023. The next prime is 1011110111131. The reversal of 1011110111111 is 1111110111101.

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-1011110111111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011110111092 and 1011110111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011110111131) 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, 922100 + ... + 1694841.

It is an arithmetic number, because the mean of its divisors is an integer number (252778278606).

Almost surely, 2^{1011110111111} is an apocalyptic number.

1011110111111 is a deficient number, since it is larger than the sum of its proper divisors (3003313).

1011110111111 is an equidigital number, since it uses as much as digits as its factorization.

1011110111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003312.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 1011110111111 its reverse (1111110111101), we get a palindrome (2122220222212).

It can be divided in two parts, 10111101 and 11111, that multiplied together give a palindrome (112344443211).

The spelling of 1011110111111 in words is "one trillion, eleven billion, one hundred ten million, one hundred eleven thousand, one hundred eleven".