1011111101111 has 4 divisors (see below), whose sum is σ = 1012760548872. Its totient is φ = 1009461653352.

The previous prime is 1011111101107. The next prime is 1011111101179. The reversal of 1011111101111 is 1111011111101.

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 1011111101111 - 2² = 1011111101107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011111101092 and 1011111101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011111101311) 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 in 3 ways as a sum of consecutive naturals, for example, 824722961 + ... + 824724186.

It is an arithmetic number, because the mean of its divisors is an integer number (253190137218).

Almost surely, 2^{1011111101111} is an apocalyptic number.

1011111101111 is a deficient number, since it is larger than the sum of its proper divisors (1649447761).

1011111101111 is an equidigital number, since it uses as much as digits as its factorization.

1011111101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649447760.

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

Adding to 1011111101111 its reverse (1111011111101), we get a palindrome (2122122212212).

It can be divided in two parts, 1011111101 and 111, that multiplied together give a palindrome (112233332211).

The spelling of 1011111101111 in words is "one trillion, eleven billion, one hundred eleven million, one hundred one thousand, one hundred eleven".