21303210202 has 8 divisors (see below), whose sum is σ = 31969774836. Its totient is φ = 10646618592.

The previous prime is 21303210197. The next prime is 21303210217. The reversal of 21303210202 is 20201230312.

It can be written as a sum of positive squares in 2 ways, for example, as 21301110601 + 2099601 = 145949^2 + 1449^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2487913 + ... + 2496460.

Almost surely, 2^21303210202 is an apocalyptic number.

21303210202 is a deficient number, since it is larger than the sum of its proper divisors (10666564634).

21303210202 is a wasteful number, since it uses less digits than its factorization.

21303210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986512.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21303210202 its reverse (20201230312), we get a palindrome (41504440514).

The spelling of 21303210202 in words is "twenty-one billion, three hundred three million, two hundred ten thousand, two hundred two".