2121101210 has 8 divisors (see below), whose sum is σ = 3817982196. Its totient is φ = 848440480.

The previous prime is 2121101197. The next prime is 2121101261. The reversal of 2121101210 is 121011212.

It can be written as a sum of positive squares in 2 ways, for example, as 1909427809 + 211673401 = 43697^2 + 14549^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121101191 and 2121101200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106055051 + ... + 106055070.

Almost surely, 2^2121101210 is an apocalyptic number.

2121101210 is a deficient number, since it is larger than the sum of its proper divisors (1696880986).

2121101210 is a wasteful number, since it uses less digits than its factorization.

2121101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212110128.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2121101210 is about 46055.4145568141. The cubic root of 2121101210 is about 1284.8540483347.

Adding to 2121101210 its reverse (121011212), we get a palindrome (2242112422).

The spelling of 2121101210 in words is "two billion, one hundred twenty-one million, one hundred one thousand, two hundred ten".