210221120203729 has 2 divisors, whose sum is σ = 210221120203730. Its totient is φ = 210221120203728.

The previous prime is 210221120203711. The next prime is 210221120203739. The reversal of 210221120203729 is 927302021122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177099483784129 + 33121636419600 = 13307873^2 + 5755140^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221120203729 - 2⁹ = 210221120203217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210221120203694 and 210221120203703.

It is not a weakly prime, because it can be changed into another prime (210221120203739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110560101864 + 105110560101865.

It is an arithmetic number, because the mean of its divisors is an integer number (105110560101865).

Almost surely, 2^{210221120203729} is an apocalyptic number.

It is an amenable number.

210221120203729 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221120203729 is an equidigital number, since it uses as much as digits as its factorization.

210221120203729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 210221120203729 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twenty million, two hundred three thousand, seven hundred twenty-nine".