112221122172 has 24 divisors (see below), whose sum is σ = 270878571600. Its totient is φ = 36117142656.

The previous prime is 112221122171. The next prime is 112221122287. The reversal of 112221122172 is 271221122211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112221122171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161236897 + ... + 161237592.

It is an arithmetic number, because the mean of its divisors is an integer number (11286607150).

Almost surely, 2^112221122172 is an apocalyptic number.

112221122172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

112221122172 is an abundant number, since it is smaller than the sum of its proper divisors (158657449428).

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

112221122172 is a wasteful number, since it uses less digits than its factorization.

112221122172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322474525 (or 322474523 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

Adding to 112221122172 its reverse (271221122211), we get a palindrome (383442244383).

The spelling of 112221122172 in words is "one hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred seventy-two".