21421203322 has 8 divisors (see below), whose sum is σ = 32449941972. Its totient is φ = 10604556000.

The previous prime is 21421203299. The next prime is 21421203359. The reversal of 21421203322 is 22330212412.

It can be written as a sum of positive squares in 2 ways, for example, as 21377656521 + 43546801 = 146211^2 + 6599^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21421203293 and 21421203302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53022579 + ... + 53022982.

Almost surely, 2^21421203322 is an apocalyptic number.

21421203322 is a deficient number, since it is larger than the sum of its proper divisors (11028738650).

21421203322 is a wasteful number, since it uses less digits than its factorization.

21421203322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106045664.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21421203322 its reverse (22330212412), we get a palindrome (43751415734).

The spelling of 21421203322 in words is "twenty-one billion, four hundred twenty-one million, two hundred three thousand, three hundred twenty-two".