20111100202101 has 32 divisors (see below), whose sum is σ = 27075706301952. Its totient is φ = 13277395010880.

The previous prime is 20111100202099. The next prime is 20111100202111. The reversal of 20111100202101 is 10120200111102.

It is not a de Polignac number, because 20111100202101 - 2¹ = 20111100202099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111100202111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506136231 + ... + 506175963.

It is an arithmetic number, because the mean of its divisors is an integer number (846115821936).

Almost surely, 2^{20111100202101} is an apocalyptic number.

It is an amenable number.

20111100202101 is a deficient number, since it is larger than the sum of its proper divisors (6964606099851).

20111100202101 is a wasteful number, since it uses less digits than its factorization.

20111100202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42513.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111100202101 its reverse (10120200111102), we get a palindrome (30231300313203).

Subtracting from 20111100202101 its reverse (10120200111102), we obtain a palindrome (9990900090999).

The spelling of 20111100202101 in words is "twenty trillion, one hundred eleven billion, one hundred million, two hundred two thousand, one hundred one".