21322121223 has 16 divisors (see below), whose sum is σ = 30619363040. Its totient is φ = 13120026624.

The previous prime is 21322121221. The next prime is 21322121243. The reversal of 21322121223 is 32212122312.

It is not a de Polignac number, because 21322121223 - 2¹ = 21322121221 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 21322121223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322121221) 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 15 ways as a sum of consecutive naturals, for example, 521343 + ... + 560751.

It is an arithmetic number, because the mean of its divisors is an integer number (1913710190).

Almost surely, 2^21322121223 is an apocalyptic number.

21322121223 is a deficient number, since it is larger than the sum of its proper divisors (9297241817).

21322121223 is a wasteful number, since it uses less digits than its factorization.

21322121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53298.

The product of its digits is 576, while the sum is 21.

Adding to 21322121223 its reverse (32212122312), we get a palindrome (53534243535).

The spelling of 21322121223 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-three".