21112100011101 has 96 divisors (see below), whose sum is σ = 34202211563520. Its totient is φ = 11520880525440.

The previous prime is 21112100011087. The next prime is 21112100011141. The reversal of 21112100011101 is 10111000121112.

It is not a de Polignac number, because 21112100011101 - 2¹⁰ = 21112100010077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112100011141) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24481216 + ... + 25328918.

It is an arithmetic number, because the mean of its divisors is an integer number (356273037120).

Almost surely, 2^{21112100011101} is an apocalyptic number.

It is an amenable number.

21112100011101 is a deficient number, since it is larger than the sum of its proper divisors (13090111552419).

21112100011101 is a wasteful number, since it uses less digits than its factorization.

21112100011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847927 (or 847916 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21112100011101 its reverse (10111000121112), we get a palindrome (31223100132213).

The spelling of 21112100011101 in words is "twenty-one trillion, one hundred twelve billion, one hundred million, eleven thousand, one hundred one".