21110110002112 has 112 divisors (see below), whose sum is σ = 43041931504992. Its totient is φ = 10268444426240.

The previous prime is 21110110002041. The next prime is 21110110002229. The reversal of 21110110002112 is 21120001101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110110002092 and 21110110002101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409378443 + ... + 409430005.

It is an arithmetic number, because the mean of its divisors is an integer number (384302959866).

Almost surely, 2^{21110110002112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110110002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21520965752496).

21110110002112 is an abundant number, since it is smaller than the sum of its proper divisors (21931821502880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110110002112 is a wasteful number, since it uses less digits than its factorization.

21110110002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52646 (or 52636 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110110002112 its reverse (21120001101112), we get a palindrome (42230111103224).

The spelling of 21110110002112 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, two thousand, one hundred twelve".