2112221172 has 48 divisors (see below), whose sum is σ = 5085400320. Its totient is φ = 681971712.

The previous prime is 2112221171. The next prime is 2112221179. The reversal of 2112221172 is 2711222112.

It is a super-2 number, since 2×2112221172² = 8922956558890107168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35404 + ... + 74012.

It is an arithmetic number, because the mean of its divisors is an integer number (105945840).

Almost surely, 2^2112221172 is an apocalyptic number.

It is an amenable number.

2112221172 is an abundant number, since it is smaller than the sum of its proper divisors (2973179148).

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

2112221172 is a wasteful number, since it uses less digits than its factorization.

2112221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38760 (or 38758 counting only the distinct ones).

The product of its digits is 224, while the sum is 21.

The square root of 2112221172 is about 45958.9074282668. The cubic root of 2112221172 is about 1283.0585168481.

Adding to 2112221172 its reverse (2711222112), we get a palindrome (4823443284).

The spelling of 2112221172 in words is "two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred seventy-two".