21000210202 has 8 divisors (see below), whose sum is σ = 31854251700. Its totient is φ = 10382126304.

The previous prime is 21000210163. The next prime is 21000210221. The reversal of 21000210202 is 20201200012.

It can be written as a sum of positive squares in 2 ways, for example, as 18181555921 + 2818654281 = 134839^2 + 53091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 58989177 + ... + 58989532.

Almost surely, 2^21000210202 is an apocalyptic number.

21000210202 is a deficient number, since it is larger than the sum of its proper divisors (10854041498).

21000210202 is a wasteful number, since it uses less digits than its factorization.

21000210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117978800.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21000210202 its reverse (20201200012), we get a palindrome (41201410214).

The spelling of 21000210202 in words is "twenty-one billion, two hundred ten thousand, two hundred two".