210220020122221 has 2 divisors, whose sum is σ = 210220020122222. Its totient is φ = 210220020122220.

The previous prime is 210220020122179. The next prime is 210220020122249. The reversal of 210220020122221 is 122221020022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158946257397321 + 51273762724900 = 12607389^2 + 7160570^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220020122221 - 2³¹ = 210217872638573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220020122261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110010061110 + 105110010061111.

It is an arithmetic number, because the mean of its divisors is an integer number (105110010061111).

Almost surely, 2^{210220020122221} is an apocalyptic number.

It is an amenable number.

210220020122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220020122221 is an equidigital number, since it uses as much as digits as its factorization.

210220020122221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 210220020122221 its reverse (122221020022012), we get a palindrome (332441040144233).

The spelling of 210220020122221 in words is "two hundred ten trillion, two hundred twenty billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".