971222112 has 144 divisors (see below), whose sum is σ = 3192527520. Its totient is φ = 274323456.

The previous prime is 971222111. The next prime is 971222141. The reversal of 971222112 is 211222179.

971222112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971222111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176718 + ... + 182130.

It is an arithmetic number, because the mean of its divisors is an integer number (22170330).

Almost surely, 2^971222112 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 971222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596263760).

971222112 is an abundant number, since it is smaller than the sum of its proper divisors (2221305408).

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

971222112 is a wasteful number, since it uses less digits than its factorization.

971222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525 (or 5514 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 971222112 is about 31164.4366546228. The cubic root of 971222112 is about 990.3138521289.

The spelling of 971222112 in words is "nine hundred seventy-one million, two hundred twenty-two thousand, one hundred twelve".