21213001322 has 8 divisors (see below), whose sum is σ = 31889130276. Its totient is φ = 10583291232.

The previous prime is 21213001321. The next prime is 21213001333. The reversal of 21213001322 is 22310031212.

It can be written as a sum of positive squares in 2 ways, for example, as 16034903641 + 5178097681 = 126629^2 + 71959^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21213001322.

It is not an unprimeable number, because it can be changed into a prime (21213001321) by changing a digit.

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, 11603573 + ... + 11605400.

Almost surely, 2^21213001322 is an apocalyptic number.

21213001322 is a deficient number, since it is larger than the sum of its proper divisors (10676128954).

21213001322 is a wasteful number, since it uses less digits than its factorization.

21213001322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23209432.

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

Adding to 21213001322 its reverse (22310031212), we get a palindrome (43523032534).

The spelling of 21213001322 in words is "twenty-one billion, two hundred thirteen million, one thousand, three hundred twenty-two".