111001111001101 has 4 divisors (see below), whose sum is σ = 112100131902204. Its totient is φ = 109902090100000.

The previous prime is 111001111001083. The next prime is 111001111001111. The reversal of 111001111001101 is 101100111100111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84148515562500 + 26852595438601 = 9173250^2 + 5181949^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001111001101 - 2⁷ = 111001111000973 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 (111001111001111) 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, 549510450400 + ... + 549510450601.

It is an arithmetic number, because the mean of its divisors is an integer number (28025032975551).

Almost surely, 2^{111001111001101} is an apocalyptic number.

It is an amenable number.

111001111001101 is a deficient number, since it is larger than the sum of its proper divisors (1099020901103).

111001111001101 is a wasteful number, since it uses less digits than its factorization.

111001111001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099020901102.

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

Adding to 111001111001101 its reverse (101100111100111), we get a palindrome (212101222101212).

It can be divided in two parts, 11100111100110 and 1, that added together give a palindrome (11100111100111).

The spelling of 111001111001101 in words is "one hundred eleven trillion, one billion, one hundred eleven million, one thousand, one hundred one".