21022220323 has 8 divisors (see below), whose sum is σ = 22791258000. Its totient is φ = 19274888928.

The previous prime is 21022220299. The next prime is 21022220327. The reversal of 21022220323 is 32302222012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022220323 - 2⁵ = 21022220291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022220323.

It is not an unprimeable number, because it can be changed into a prime (21022220327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5424553 + ... + 5428426.

It is an arithmetic number, because the mean of its divisors is an integer number (2848907250).

Almost surely, 2^21022220323 is an apocalyptic number.

21022220323 is a deficient number, since it is larger than the sum of its proper divisors (1769037677).

21022220323 is a wasteful number, since it uses less digits than its factorization.

21022220323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10853141.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21022220323 its reverse (32302222012), we get a palindrome (53324442335).

The spelling of 21022220323 in words is "twenty-one billion, twenty-two million, two hundred twenty thousand, three hundred twenty-three".