2101221210 has 64 divisors (see below), whose sum is σ = 5790942720. Its totient is φ = 482575680.

The previous prime is 2101221193. The next prime is 2101221247. The reversal of 2101221210 is 121221012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161292 + ... + 173831.

It is an arithmetic number, because the mean of its divisors is an integer number (90483480).

Almost surely, 2^2101221210 is an apocalyptic number.

2101221210 is an abundant number, since it is smaller than the sum of its proper divisors (3689721510).

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

2101221210 is a wasteful number, since it uses less digits than its factorization.

2101221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335163.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101221210 is about 45839.0795064648. The cubic root of 2101221210 is about 1280.8273480093.

Adding to 2101221210 its reverse (121221012), we get a palindrome (2222442222).

The spelling of 2101221210 in words is "two billion, one hundred one million, two hundred twenty-one thousand, two hundred ten".