21022044210321 has 48 divisors (see below), whose sum is σ = 34985656535040. Its totient is φ = 10908081444960.

The previous prime is 21022044210289. The next prime is 21022044210361. The reversal of 21022044210321 is 12301244022012.

It is not a de Polignac number, because 21022044210321 - 2⁵ = 21022044210289 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21022044210291 and 21022044210300.

It is not an unprimeable number, because it can be changed into a prime (21022044210361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180049800 + ... + 180166518.

It is an arithmetic number, because the mean of its divisors is an integer number (728867844480).

Almost surely, 2^{21022044210321} is an apocalyptic number.

21022044210321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21022044210321 is a deficient number, since it is larger than the sum of its proper divisors (13963612324719).

21022044210321 is an equidigital number, since it uses as much as digits as its factorization.

21022044210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118506 (or 117623 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21022044210321 its reverse (12301244022012), we get a palindrome (33323288232333).

The spelling of 21022044210321 in words is "twenty-one trillion, twenty-two billion, forty-four million, two hundred ten thousand, three hundred twenty-one".