2121171206 has 16 divisors (see below), whose sum is σ = 3966865920. Its totient is φ = 826430280.

The previous prime is 2121171193. The next prime is 2121171233. The reversal of 2121171206 is 6021711212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6886766 + ... + 6887073.

It is an arithmetic number, because the mean of its divisors is an integer number (247929120).

Almost surely, 2^2121171206 is an apocalyptic number.

2121171206 is a deficient number, since it is larger than the sum of its proper divisors (1845694714).

2121171206 is a wasteful number, since it uses less digits than its factorization.

2121171206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13773859.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 2121171206 is about 46056.1744611947. The cubic root of 2121171206 is about 1284.8681815051.

Adding to 2121171206 its reverse (6021711212), we get a palindrome (8142882418).

The spelling of 2121171206 in words is "two billion, one hundred twenty-one million, one hundred seventy-one thousand, two hundred six".