1101100111111 has 96 divisors (see below), whose sum is σ = 1547300192256. Its totient is φ = 769777344000.

The previous prime is 1101100111109. The next prime is 1101100111127. The reversal of 1101100111111 is 1111110011011.

It is a happy number.

It is not a de Polignac number, because 1101100111111 - 2¹ = 1101100111109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101100117111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77847706 + ... + 77861848.

It is an arithmetic number, because the mean of its divisors is an integer number (16117710336).

Almost surely, 2^{1101100111111} is an apocalyptic number.

1101100111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101100111111 is a deficient number, since it is larger than the sum of its proper divisors (446200081145).

1101100111111 is a wasteful number, since it uses less digits than its factorization.

1101100111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14493 (or 14486 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 1101100111111 its reverse (1111110011011), we get a palindrome (2212210122122).

The spelling of 1101100111111 in words is "one trillion, one hundred one billion, one hundred million, one hundred eleven thousand, one hundred eleven".