21210303302 has 4 divisors (see below), whose sum is σ = 31815454956. Its totient is φ = 10605151650.

The previous prime is 21210303293. The next prime is 21210303343. The reversal of 21210303302 is 20330301212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5302575824 + ... + 5302575827.

It is an arithmetic number, because the mean of its divisors is an integer number (7953863739).

Almost surely, 2^21210303302 is an apocalyptic number.

21210303302 is a deficient number, since it is larger than the sum of its proper divisors (10605151654).

21210303302 is a wasteful number, since it uses less digits than its factorization.

21210303302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605151653.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21210303302 its reverse (20330301212), we get a palindrome (41540604514).

The spelling of 21210303302 in words is "twenty-one billion, two hundred ten million, three hundred three thousand, three hundred two".