21223223022021 has 4 divisors (see below), whose sum is σ = 28297630696032. Its totient is φ = 14148815348012.

The previous prime is 21223223022017. The next prime is 21223223022049. The reversal of 21223223022021 is 12022032232212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21223223022021 - 2² = 21223223022017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21223223021982 and 21223223022000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223223022121) 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, 3537203837001 + ... + 3537203837006.

It is an arithmetic number, because the mean of its divisors is an integer number (7074407674008).

Almost surely, 2^{21223223022021} is an apocalyptic number.

It is an amenable number.

21223223022021 is a deficient number, since it is larger than the sum of its proper divisors (7074407674011).

21223223022021 is an equidigital number, since it uses as much as digits as its factorization.

21223223022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074407674010.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21223223022021 its reverse (12022032232212), we get a palindrome (33245255254233).

The spelling of 21223223022021 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty-three million, twenty-two thousand, twenty-one".