21000303210 has 32 divisors (see below), whose sum is σ = 50405546880. Its totient is φ = 5599545408.

The previous prime is 21000303199. The next prime is 21000303211. The reversal of 21000303210 is 1230300012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21000303211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 362211 + ... + 416169.

It is an arithmetic number, because the mean of its divisors is an integer number (1575173340).

Almost surely, 2^21000303210 is an apocalyptic number.

21000303210 is an abundant number, since it is smaller than the sum of its proper divisors (29405243670).

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

21000303210 is a wasteful number, since it uses less digits than its factorization.

21000303210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66942.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21000303210 its reverse (1230300012), we get a palindrome (22230603222).

The spelling of 21000303210 in words is "twenty-one billion, three hundred three thousand, two hundred ten".