2121207170 has 16 divisors (see below), whose sum is σ = 3819769920. Its totient is φ = 848127984.

The previous prime is 2121207167. The next prime is 2121207197. The reversal of 2121207170 is 717021212.

It is a super-3 number, since 3×2121207170³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18542 + ... + 67721.

It is an arithmetic number, because the mean of its divisors is an integer number (238735620).

Almost surely, 2^2121207170 is an apocalyptic number.

2121207170 is a deficient number, since it is larger than the sum of its proper divisors (1698562750).

2121207170 is a wasteful number, since it uses less digits than its factorization.

2121207170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88729.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 2121207170 is about 46056.5648957887. The cubic root of 2121207170 is about 1284.8754430183.

Adding to 2121207170 its reverse (717021212), we get a palindrome (2838228382).

The spelling of 2121207170 in words is "two billion, one hundred twenty-one million, two hundred seven thousand, one hundred seventy".