21210313202 has 8 divisors (see below), whose sum is σ = 34262813676. Its totient is φ = 9789375312.

The previous prime is 21210313199. The next prime is 21210313237. The reversal of 21210313202 is 20231301212.

It can be written as a sum of positive squares in 2 ways, for example, as 18956057761 + 2254255441 = 137681^2 + 47479^2 .

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

It is a super-2 number, since 2×21210313202² (a number of 21 digits) contains 22 as substring.

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, 407890613 + ... + 407890664.

Almost surely, 2^21210313202 is an apocalyptic number.

21210313202 is a deficient number, since it is larger than the sum of its proper divisors (13052500474).

21210313202 is a wasteful number, since it uses less digits than its factorization.

21210313202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815781292.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210313202 its reverse (20231301212), we get a palindrome (41441614414).

The spelling of 21210313202 in words is "twenty-one billion, two hundred ten million, three hundred thirteen thousand, two hundred two".