221120212100321 has 2 divisors, whose sum is σ = 221120212100322. Its totient is φ = 221120212100320.

The previous prime is 221120212100311. The next prime is 221120212100351. The reversal of 221120212100321 is 123001212021122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162092721886096 + 59027490214225 = 12731564^2 + 7682935^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120212100321 - 2²⁶ = 221120144991457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221120212100293 and 221120212100302.

It is not a weakly prime, because it can be changed into another prime (221120212100311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560106050160 + 110560106050161.

It is an arithmetic number, because the mean of its divisors is an integer number (110560106050161).

Almost surely, 2^{221120212100321} is an apocalyptic number.

It is an amenable number.

221120212100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120212100321 is an equidigital number, since it uses as much as digits as its factorization.

221120212100321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221120212100321 its reverse (123001212021122), we get a palindrome (344121424121443).

The spelling of 221120212100321 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred twelve million, one hundred thousand, three hundred twenty-one".