211111322112 has 80 divisors (see below), whose sum is σ = 624904214880. Its totient is φ = 70370436096.

The previous prime is 211111322111. The next prime is 211111322141. The reversal of 211111322112 is 211223111112.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an insolite number, because it is divisible by the sum (32) and by the product (2304) of the squares of its digits.

It is not an unprimeable number, because it can be changed into a prime (211111322111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7621858 + ... + 7649505.

It is an arithmetic number, because the mean of its divisors is an integer number (7811302686).

Almost surely, 2^211111322112 is an apocalyptic number.

It is an amenable number.

211111322112 is an abundant number, since it is smaller than the sum of its proper divisors (413792892768).

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

211111322112 is an equidigital number, since it uses as much as digits as its factorization.

211111322112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15271390 (or 15271368 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 211111322112 its reverse (211223111112), we get a palindrome (422334433224).

The spelling of 211111322112 in words is "two hundred eleven billion, one hundred eleven million, three hundred twenty-two thousand, one hundred twelve".