21200000210 has 32 divisors (see below), whose sum is σ = 39495956400. Its totient is φ = 8183418880.

The previous prime is 21200000141. The next prime is 21200000219. The reversal of 21200000210 is 1200000212.

It can be written as a sum of positive squares in 8 ways, for example, as 3178817161 + 18021183049 = 56381^2 + 134243^2 .

It is not an unprimeable number, because it can be changed into a prime (21200000219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585926 + ... + 621054.

Almost surely, 2^21200000210 is an apocalyptic number.

21200000210 is a deficient number, since it is larger than the sum of its proper divisors (18295956190).

21200000210 is a wasteful number, since it uses less digits than its factorization.

21200000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37246.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21200000210 its reverse (1200000212), we get a palindrome (22400000422).

The spelling of 21200000210 in words is "twenty-one billion, two hundred million, two hundred ten", and thus it is an aban number.