1101111011111 has 4 divisors (see below), whose sum is σ = 1102067668224. Its totient is φ = 1100154354000.

The previous prime is 1101111011083. The next prime is 1101111011141. The reversal of 1101111011111 is 1111101111011.

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 1101111011111 - 2⁶ = 1101111011047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101111011092 and 1101111011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478326830 + ... + 478329131.

It is an arithmetic number, because the mean of its divisors is an integer number (275516917056).

Almost surely, 2^{1101111011111} is an apocalyptic number.

1101111011111 is a deficient number, since it is larger than the sum of its proper divisors (956657113).

1101111011111 is an equidigital number, since it uses as much as digits as its factorization.

1101111011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956657112.

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

Adding to 1101111011111 its reverse (1111101111011), we get a palindrome (2212212122122).

It can be divided in two parts, 1101111011 and 111, that multiplied together give a palindrome (122223322221).

The spelling of 1101111011111 in words is "one trillion, one hundred one billion, one hundred eleven million, eleven thousand, one hundred eleven".