2121322210 has 24 divisors (see below), whose sum is σ = 4441789980. Its totient is φ = 727310304.

The previous prime is 2121322207. The next prime is 2121322253. The reversal of 2121322210 is 122231212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2087484721 + 33837489 = 45689^2 + 5817^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2164125 + ... + 2165104.

Almost surely, 2^2121322210 is an apocalyptic number.

2121322210 is an abundant number, since it is smaller than the sum of its proper divisors (2320467770).

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

2121322210 is a wasteful number, since it uses less digits than its factorization.

2121322210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329250 (or 4329243 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121322210 is about 46057.8137779031. The cubic root of 2121322210 is about 1284.8986702638.

Adding to 2121322210 its reverse (122231212), we get a palindrome (2243553422).

The spelling of 2121322210 in words is "two billion, one hundred twenty-one million, three hundred twenty-two thousand, two hundred ten".