21203322210 has 112 divisors (see below), whose sum is σ = 65397635136. Its totient is φ = 4846461984.

The previous prime is 21203322193. The next prime is 21203322221. The reversal of 21203322210 is 1222330212.

21203322210 is a `hidden beast` number, since 2 + 120 + 332 + 2 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 156724 + ... + 258783.

Almost surely, 2^21203322210 is an apocalyptic number.

21203322210 is an abundant number, since it is smaller than the sum of its proper divisors (44194312926).

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

21203322210 is an equidigital number, since it uses as much as digits as its factorization.

21203322210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415539 (or 415524 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21203322210 its reverse (1222330212), we get a palindrome (22425652422).

The spelling of 21203322210 in words is "twenty-one billion, two hundred three million, three hundred twenty-two thousand, two hundred ten".