21112210111122 has 96 divisors (see below), whose sum is σ = 49484577542400. Its totient is φ = 6466697176320.

The previous prime is 21112210111099. The next prime is 21112210111163. The reversal of 21112210111122 is 22111101221112.

It is a happy number.

21112210111122 is a `hidden beast` number, since 211 + 1 + 221 + 0 + 111 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21112210111095 and 21112210111104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 609299254 + ... + 609333902.

It is an arithmetic number, because the mean of its divisors is an integer number (515464349400).

Almost surely, 2^{21112210111122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112210111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24742288771200).

21112210111122 is an abundant number, since it is smaller than the sum of its proper divisors (28372367431278).

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

21112210111122 is a wasteful number, since it uses less digits than its factorization.

21112210111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46368 (or 46365 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21112210111122 its reverse (22111101221112), we get a palindrome (43223311332234).

The spelling of 21112210111122 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, one hundred eleven thousand, one hundred twenty-two".