2102021210 has 32 divisors (see below), whose sum is σ = 4009597200. Its totient is φ = 792010240.

The previous prime is 2102021209. The next prime is 2102021227. The reversal of 2102021210 is 121202012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 128618281 + 1973402929 = 11341^2 + 44423^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2102021191 and 2102021200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76505 + ... + 100284.

Almost surely, 2^2102021210 is an apocalyptic number.

2102021210 is a deficient number, since it is larger than the sum of its proper divisors (1907575990).

2102021210 is a wasteful number, since it uses less digits than its factorization.

2102021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176866.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2102021210 is about 45847.8048547583. The cubic root of 2102021210 is about 1280.9898775994.

Adding to 2102021210 its reverse (121202012), we get a palindrome (2223223222).

The spelling of 2102021210 in words is "two billion, one hundred two million, twenty-one thousand, two hundred ten".