2121001210 has 8 divisors (see below), whose sum is σ = 3817802196. Its totient is φ = 848400480.

The previous prime is 2121001193. The next prime is 2121001213. The reversal of 2121001210 is 121001212.

It can be written as a sum of positive squares in 2 ways, for example, as 2076898329 + 44102881 = 45573^2 + 6641^2 .

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

It is a super-2 number, since 2×2121001210² = 8997292265642928200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 212100121 = 2121001210 / (2 + 1 + 2 + 1 + 0 + 0 + 1 + 2 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (2121001213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106050051 + ... + 106050070.

Almost surely, 2^2121001210 is an apocalyptic number.

2121001210 is a deficient number, since it is larger than the sum of its proper divisors (1696800986).

2121001210 is a wasteful number, since it uses less digits than its factorization.

2121001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212100128.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2121001210 is about 46054.3288953384. The cubic root of 2121001210 is about 1284.8338563980.

Adding to 2121001210 its reverse (121001212), we get a palindrome (2242002422).

The spelling of 2121001210 in words is "two billion, one hundred twenty-one million, one thousand, two hundred ten".