21112201101112 has 64 divisors (see below), whose sum is σ = 43960666809600. Its totient is φ = 9424204035840.

The previous prime is 21112201101097. The next prime is 21112201101139. The reversal of 21112201101112 is 21110110221112.

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, 3035428 + ... + 7172044.

It is an arithmetic number, because the mean of its divisors is an integer number (686885418900).

Almost surely, 2^{21112201101112} is an apocalyptic number.

21112201101112 is a gapful number since it is divisible by the number (22) 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 21112201101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21980333404800).

21112201101112 is an abundant number, since it is smaller than the sum of its proper divisors (22848465708488).

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

21112201101112 is a wasteful number, since it uses less digits than its factorization.

21112201101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137676 (or 4137672 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21112201101112 its reverse (21110110221112), we get a palindrome (42222311322224).

The spelling of 21112201101112 in words is "twenty-one trillion, one hundred twelve billion, two hundred one million, one hundred one thousand, one hundred twelve".