21202002210 has 64 divisors (see below), whose sum is σ = 52341811200. Its totient is φ = 5493711552.

The previous prime is 21202002187. The next prime is 21202002223. The reversal of 21202002210 is 1220020212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141901 + ... + 250079.

It is an arithmetic number, because the mean of its divisors is an integer number (817840800).

Almost surely, 2^21202002210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202002210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26170905600).

21202002210 is an abundant number, since it is smaller than the sum of its proper divisors (31139808990).

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

21202002210 is a wasteful number, since it uses less digits than its factorization.

21202002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108375.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21202002210 its reverse (1220020212), we get a palindrome (22422022422).

The spelling of 21202002210 in words is "twenty-one billion, two hundred two million, two thousand, two hundred ten".