1121110111 has 4 divisors (see below), whose sum is σ = 1223029224. Its totient is φ = 1019191000.

The previous prime is 1121110103. The next prime is 1121110117. The reversal of 1121110111 is 1110111211.

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 1121110111 - 2³ = 1121110103 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 (1121110117) 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, 50959540 + ... + 50959561.

It is an arithmetic number, because the mean of its divisors is an integer number (305757306).

Almost surely, 2^1121110111 is an apocalyptic number.

1121110111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121110111 is a deficient number, since it is larger than the sum of its proper divisors (101919113).

1121110111 is a wasteful number, since it uses less digits than its factorization.

1121110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101919112.

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

The square root of 1121110111 is about 33482.9824089790. The cubic root of 1121110111 is about 1038.8418168832.

Adding to 1121110111 its reverse (1110111211), we get a palindrome (2231221322).

The spelling of 1121110111 in words is "one billion, one hundred twenty-one million, one hundred ten thousand, one hundred eleven".