21220230123021 has 8 divisors (see below), whose sum is σ = 28681224276160. Its totient is φ = 13953028025952.

The previous prime is 21220230122969. The next prime is 21220230123049. The reversal of 21220230123021 is 12032103202212.

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

It is not a de Polignac number, because 21220230123021 - 2⁶ = 21220230122957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220230125021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48448013761 + ... + 48448014198.

It is an arithmetic number, because the mean of its divisors is an integer number (3585153034520).

Almost surely, 2^{21220230123021} is an apocalyptic number.

It is an amenable number.

21220230123021 is a deficient number, since it is larger than the sum of its proper divisors (7460994153139).

21220230123021 is an equidigital number, since it uses as much as digits as its factorization.

21220230123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96896028035.

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

Adding to 21220230123021 its reverse (12032103202212), we get a palindrome (33252333325233).

The spelling of 21220230123021 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirty million, one hundred twenty-three thousand, twenty-one".