111020011111 has 4 divisors (see below), whose sum is σ = 114601301824. Its totient is φ = 107438720400.

The previous prime is 111020011099. The next prime is 111020011121. The reversal of 111020011111 is 111110020111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020011111 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 (111020011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790645310 + ... + 1790645371.

It is an arithmetic number, because the mean of its divisors is an integer number (28650325456).

Almost surely, 2^111020011111 is an apocalyptic number.

111020011111 is a deficient number, since it is larger than the sum of its proper divisors (3581290713).

111020011111 is an equidigital number, since it uses as much as digits as its factorization.

111020011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581290712.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 111020011111 its reverse (111110020111), we get a palindrome (222130031222).

The spelling of 111020011111 in words is "one hundred eleven billion, twenty million, eleven thousand, one hundred eleven".