111111010101011 has 4 divisors (see below), whose sum is σ = 111111033954672. Its totient is φ = 111110986247352.

The previous prime is 111111010100941. The next prime is 111111010101017. The reversal of 111111010101011 is 110101010111111.

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 111111010101011 - 2¹⁰ = 111111010099987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111010100983 and 111111010101001.

It is not an unprimeable number, because it can be changed into a prime (111111010101017) 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, 2406836 + ... + 15100161.

It is an arithmetic number, because the mean of its divisors is an integer number (27777758488668).

Almost surely, 2^{111111010101011} is an apocalyptic number.

111111010101011 is a deficient number, since it is larger than the sum of its proper divisors (23853661).

111111010101011 is an equidigital number, since it uses as much as digits as its factorization.

111111010101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23853660.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 111111010101011 its reverse (110101010111111), we get a palindrome (221212020212122).

It can be divided in two parts, 1111 and 11010101011, that multiplied together give a palindrome (12232222223221).

The spelling of 111111010101011 in words is "one hundred eleven trillion, one hundred eleven billion, ten million, one hundred one thousand, eleven".