1011011111011 has 4 divisors (see below), whose sum is σ = 1102921212024. Its totient is φ = 919101010000.

The previous prime is 1011011111009. The next prime is 1011011111087. The reversal of 1011011111011 is 1101111101101.

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 1011011111011 - 2¹ = 1011011111009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011011111311) 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, 45955050490 + ... + 45955050511.

It is an arithmetic number, because the mean of its divisors is an integer number (275730303006).

Almost surely, 2^{1011011111011} is an apocalyptic number.

1011011111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1011011111011 is a deficient number, since it is larger than the sum of its proper divisors (91910101013).

1011011111011 is an equidigital number, since it uses as much as digits as its factorization.

1011011111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91910101012.

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

Adding to 1011011111011 its reverse (1101111101101), we get a palindrome (2112122212112).

The spelling of 1011011111011 in words is "one trillion, eleven billion, eleven million, one hundred eleven thousand, eleven".