1101311111 has 4 divisors (see below), whose sum is σ = 1103240424. Its totient is φ = 1099381800.

The previous prime is 1101311087. The next prime is 1101311129. The reversal of 1101311111 is 1111131011.

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 1101311111 - 2¹⁰ = 1101310087 is a prime.

It is a Duffinian number.

1101311111 is a modest number, since divided by 11111 gives 11013 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1101311092 and 1101311101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101311311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963800 + ... + 964941.

It is an arithmetic number, because the mean of its divisors is an integer number (275810106).

Almost surely, 2^1101311111 is an apocalyptic number.

1101311111 is a deficient number, since it is larger than the sum of its proper divisors (1929313).

1101311111 is an equidigital number, since it uses as much as digits as its factorization.

1101311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929312.

The product of its (nonzero) digits is 3, while the sum is 11.

The square root of 1101311111 is about 33186.0077592952. The cubic root of 1101311111 is about 1032.6900840753.

Adding to 1101311111 its reverse (1111131011), we get a palindrome (2212442122).

The spelling of 1101311111 in words is "one billion, one hundred one million, three hundred eleven thousand, one hundred eleven".