21022222323 has 8 divisors (see below), whose sum is σ = 28066660048. Its totient is φ = 13996299744.

The previous prime is 21022222303. The next prime is 21022222349. The reversal of 21022222323 is 32322222012.

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

It is not a de Polignac number, because 21022222323 - 2¹⁶ = 21022156787 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 21022222323.

It is not an unprimeable number, because it can be changed into a prime (21022222303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4626136 + ... + 4630677.

It is an arithmetic number, because the mean of its divisors is an integer number (3508332506).

Almost surely, 2^21022222323 is an apocalyptic number.

21022222323 is a deficient number, since it is larger than the sum of its proper divisors (7044437725).

21022222323 is an equidigital number, since it uses as much as digits as its factorization.

21022222323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257573.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21022222323 its reverse (32322222012), we get a palindrome (53344444335).

The spelling of 21022222323 in words is "twenty-one billion, twenty-two million, two hundred twenty-two thousand, three hundred twenty-three".