1011111110001 has 12 divisors (see below), whose sum is σ = 1468653011280. Its totient is φ = 670308295320.

The previous prime is 1011111109997. The next prime is 1011111110011. The reversal of 1011111110001 is 1000111111101.

It is not a de Polignac number, because 1011111110001 - 2² = 1011111109997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1011111110011) 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 11 ways as a sum of consecutive naturals, for example, 313813135 + ... + 313816356.

It is an arithmetic number, because the mean of its divisors is an integer number (122387750940).

Almost surely, 2^{1011111110001} is an apocalyptic number.

It is an amenable number.

1011111110001 is a deficient number, since it is larger than the sum of its proper divisors (457541901279).

1011111110001 is a wasteful number, since it uses less digits than its factorization.

1011111110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627629676 (or 627629673 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 1011111110001 its reverse (1000111111101), we get a palindrome (2011222221102).

The spelling of 1011111110001 in words is "one trillion, eleven billion, one hundred eleven million, one hundred ten thousand, one".