11101111001101 has 16 divisors (see below), whose sum is σ = 12305453448960. Its totient is φ = 9930165635520.

The previous prime is 11101111000957. The next prime is 11101111001129. The reversal of 11101111001101 is 10110011110111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101111001101 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 (11101111001161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21545010 + ... + 22054243.

It is an arithmetic number, because the mean of its divisors is an integer number (769090840560).

Almost surely, 2^{11101111001101} is an apocalyptic number.

11101111001101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101111001101 is a deficient number, since it is larger than the sum of its proper divisors (1204342447859).

11101111001101 is a wasteful number, since it uses less digits than its factorization.

11101111001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43599636.

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

Adding to 11101111001101 its reverse (10110011110111), we get a palindrome (21211122111212).

The spelling of 11101111001101 in words is "eleven trillion, one hundred one billion, one hundred eleven million, one thousand, one hundred one".