2171212 has 12 divisors (see below), whose sum is σ = 3880800. Its totient is φ = 1062416.

The previous prime is 2171203. The next prime is 2171219. The reversal of 2171212 is 2121712.

It is not an unprimeable number, because it can be changed into a prime (2171219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5587 + ... + 5962.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

2^2171212 is an apocalyptic number.

It is an amenable number.

2171212 is a deficient number, since it is larger than the sum of its proper divisors (1709588).

2171212 is a wasteful number, since it uses less digits than its factorization.

2171212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600 (or 11598 counting only the distinct ones).

The product of its digits is 56, while the sum is 16.

The square root of 2171212 is about 1473.5033084456. The cubic root of 2171212 is about 129.4893577615.

Adding to 2171212 its reverse (2121712), we get a palindrome (4292924).

The spelling of 2171212 in words is "two million, one hundred seventy-one thousand, two hundred twelve".