2121010210 has 24 divisors (see below), whose sum is σ = 4196447388. Its totient is φ = 771276000.

The previous prime is 2121010189. The next prime is 2121010211. The reversal of 2121010210 is 120101212.

It can be written as a sum of positive squares in 2 ways, for example, as 2105066161 + 15944049 = 45881^2 + 3993^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2121010211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 875241 + ... + 877660.

Almost surely, 2^2121010210 is an apocalyptic number.

2121010210 is a deficient number, since it is larger than the sum of its proper divisors (2075437178).

2121010210 is a wasteful number, since it uses less digits than its factorization.

2121010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752930 (or 1752919 counting only the distinct ones).

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

The square root of 2121010210 is about 46054.4266059192. The cubic root of 2121010210 is about 1284.8356736983.

Adding to 2121010210 its reverse (120101212), we get a palindrome (2241111422).

The spelling of 2121010210 in words is "two billion, one hundred twenty-one million, ten thousand, two hundred ten".