1101111001101 has 24 divisors (see below), whose sum is σ = 1603485112320. Its totient is φ = 728081325216.

The previous prime is 1101111001099. The next prime is 1101111001139. The reversal of 1101111001101 is 1011001111011.

It is not a de Polignac number, because 1101111001101 - 2¹ = 1101111001099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101111001801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3826216 + ... + 4103918.

It is an arithmetic number, because the mean of its divisors is an integer number (66811879680).

Almost surely, 2^{1101111001101} is an apocalyptic number.

It is an amenable number.

1101111001101 is a deficient number, since it is larger than the sum of its proper divisors (502374111219).

1101111001101 is a wasteful number, since it uses less digits than its factorization.

1101111001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281305 (or 281302 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 1101111001101 its reverse (1011001111011), we get a palindrome (2112112112112).

The spelling of 1101111001101 in words is "one trillion, one hundred one billion, one hundred eleven million, one thousand, one hundred one".