21222052420323 has 4 divisors (see below), whose sum is σ = 28296069893768. Its totient is φ = 14148034946880.

The previous prime is 21222052420279. The next prime is 21222052420369. The reversal of 21222052420323 is 32302425022212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21222052420323 - 2¹⁴ = 21222052403939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222052422323) by changing a digit.

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, 3537008736718 + ... + 3537008736723.

It is an arithmetic number, because the mean of its divisors is an integer number (7074017473442).

Almost surely, 2^{21222052420323} is an apocalyptic number.

21222052420323 is a deficient number, since it is larger than the sum of its proper divisors (7074017473445).

21222052420323 is an equidigital number, since it uses as much as digits as its factorization.

21222052420323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074017473444.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21222052420323 its reverse (32302425022212), we get a palindrome (53524477442535).

The spelling of 21222052420323 in words is "twenty-one trillion, two hundred twenty-two billion, fifty-two million, four hundred twenty thousand, three hundred twenty-three".