10001111111 has 4 divisors (see below), whose sum is σ = 10527485400. Its totient is φ = 9474736824.

The previous prime is 10001111093. The next prime is 10001111123. The reversal of 10001111111 is 11111110001.

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-10001111111 is a prime.

It is a Duffinian number.

10001111111 is a modest number, since divided by 111111 gives 10001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001111161) 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, 263187116 + ... + 263187153.

It is an arithmetic number, because the mean of its divisors is an integer number (2631871350).

Almost surely, 2^10001111111 is an apocalyptic number.

10001111111 is a deficient number, since it is larger than the sum of its proper divisors (526374289).

10001111111 is an equidigital number, since it uses as much as digits as its factorization.

10001111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526374288.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 10001111111 its reverse (11111110001), we get a palindrome (21112221112).

It can be divided in two parts, 10001 and 111111, that multiplied together give a palindrome (1111221111).

The spelling of 10001111111 in words is "ten billion, one million, one hundred eleven thousand, one hundred eleven".