21110112212120 has 128 divisors (see below), whose sum is σ = 50636057472000. Its totient is φ = 7897495956480.

The previous prime is 21110112212117. The next prime is 21110112212257. The reversal of 21110112212120 is 2121221101112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895965140 + ... + 895988700.

It is an arithmetic number, because the mean of its divisors is an integer number (395594199000).

Almost surely, 2^{21110112212120} is an apocalyptic number.

21110112212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110112212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25318028736000).

21110112212120 is an abundant number, since it is smaller than the sum of its proper divisors (29525945259880).

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

21110112212120 is a wasteful number, since it uses less digits than its factorization.

21110112212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38593 (or 38589 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21110112212120 its reverse (2121221101112), we get a palindrome (23231333313232).

The spelling of 21110112212120 in words is "twenty-one trillion, one hundred ten billion, one hundred twelve million, two hundred twelve thousand, one hundred twenty".