2171212126 has 8 divisors (see below), whose sum is σ = 3259085760. Its totient is φ = 1084850208.

The previous prime is 2171212111. The next prime is 2171212231. The reversal of 2171212126 is 6212121712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2171212126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374331 + ... + 380086.

It is an arithmetic number, because the mean of its divisors is an integer number (407385720).

Almost surely, 2^2171212126 is an apocalyptic number.

2171212126 is a deficient number, since it is larger than the sum of its proper divisors (1087873634).

2171212126 is a wasteful number, since it uses less digits than its factorization.

2171212126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755858.

The product of its digits is 672, while the sum is 25.

The square root of 2171212126 is about 46596.2672968554. The cubic root of 2171212126 is about 1294.8936026637.

Adding to 2171212126 its reverse (6212121712), we get a palindrome (8383333838).

The spelling of 2171212126 in words is "two billion, one hundred seventy-one million, two hundred twelve thousand, one hundred twenty-six".