10001111011111 has 4 divisors (see below), whose sum is σ = 10910302921224. Its totient is φ = 9091919101000.

The previous prime is 10001111011097. The next prime is 10001111011159. The reversal of 10001111011111 is 11111011110001.

It is a happy number.

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 10001111011111 - 2¹¹ = 10001111009063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001111011211) 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, 454595955040 + ... + 454595955061.

It is an arithmetic number, because the mean of its divisors is an integer number (2727575730306).

Almost surely, 2^{10001111011111} is an apocalyptic number.

10001111011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10001111011111 is a deficient number, since it is larger than the sum of its proper divisors (909191910113).

10001111011111 is an equidigital number, since it uses as much as digits as its factorization.

10001111011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909191910112.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 10001111011111 its reverse (11111011110001), we get a palindrome (21112122121112).

The spelling of 10001111011111 in words is "ten trillion, one billion, one hundred eleven million, eleven thousand, one hundred eleven".