20111100111101 has 8 divisors (see below), whose sum is σ = 20380153920000. Its totient is φ = 19843834035600.

The previous prime is 20111100111061. The next prime is 20111100111127. The reversal of 20111100111101 is 10111100111102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111100111101 - 2¹⁰ = 20111100110077 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 (20111100111191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446910701 + ... + 446955698.

It is an arithmetic number, because the mean of its divisors is an integer number (2547519240000).

Almost surely, 2^{20111100111101} is an apocalyptic number.

It is an amenable number.

20111100111101 is a deficient number, since it is larger than the sum of its proper divisors (269053808899).

20111100111101 is a wasteful number, since it uses less digits than its factorization.

20111100111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893866699.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 20111100111101 its reverse (10111100111102), we get a palindrome (30222200222203).

Subtracting from 20111100111101 its reverse (10111100111102), we obtain a palindrome (9999999999999).

The spelling of 20111100111101 in words is "twenty trillion, one hundred eleven billion, one hundred million, one hundred eleven thousand, one hundred one".