1011111101011 has 12 divisors (see below), whose sum is σ = 1111438688976. Its totient is φ = 919148814320.

The previous prime is 1011111101009. The next prime is 1011111101023. The reversal of 1011111101011 is 1101011111101.

It is a happy number.

It is not a de Polignac number, because 1011111101011 - 2¹ = 1011111101009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011111101311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2554506 + ... + 2923648.

It is an arithmetic number, because the mean of its divisors is an integer number (92619890748).

Almost surely, 2^{1011111101011} is an apocalyptic number.

1011111101011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1011111101011 is a deficient number, since it is larger than the sum of its proper divisors (100327587965).

1011111101011 is a wasteful number, since it uses less digits than its factorization.

1011111101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391802 (or 391791 counting only the distinct ones).

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

Adding to 1011111101011 its reverse (1101011111101), we get a palindrome (2112122212112).

The spelling of 1011111101011 in words is "one trillion, eleven billion, one hundred eleven million, one hundred one thousand, eleven".