21202241204 has 12 divisors (see below), whose sum is σ = 37168231044. Its totient is φ = 10582746624.

The previous prime is 21202241197. The next prime is 21202241213. The reversal of 21202241204 is 40214220212.

It can be written as a sum of positive squares in 2 ways, for example, as 19866338704 + 1335902500 = 140948^2 + 36550^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 4590899 + ... + 4595514.

It is an arithmetic number, because the mean of its divisors is an integer number (3097352587).

Almost surely, 2^21202241204 is an apocalyptic number.

It is an amenable number.

21202241204 is a deficient number, since it is larger than the sum of its proper divisors (15965989840).

21202241204 is a wasteful number, since it uses less digits than its factorization.

21202241204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186994 (or 9186992 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21202241204 its reverse (40214220212), we get a palindrome (61416461416).

The spelling of 21202241204 in words is "twenty-one billion, two hundred two million, two hundred forty-one thousand, two hundred four".