11661100601103 has 12 divisors (see below), whose sum is σ = 17576151630960. Its totient is φ = 7436064151296.

The previous prime is 11661100601063. The next prime is 11661100601123. The reversal of 11661100601103 is 30110600116611.

It is not a de Polignac number, because 11661100601103 - 2⁶ = 11661100601039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661100601123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28166909458 + ... + 28166909871.

It is an arithmetic number, because the mean of its divisors is an integer number (1464679302580).

Almost surely, 2^{11661100601103} is an apocalyptic number.

11661100601103 is a deficient number, since it is larger than the sum of its proper divisors (5915051029857).

11661100601103 is a wasteful number, since it uses less digits than its factorization.

11661100601103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56333819358 (or 56333819355 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

Adding to 11661100601103 its reverse (30110600116611), we get a palindrome (41771700717714).

The spelling of 11661100601103 in words is "eleven trillion, six hundred sixty-one billion, one hundred million, six hundred one thousand, one hundred three".