221201010200221 has 2 divisors, whose sum is σ = 221201010200222. Its totient is φ = 221201010200220.

The previous prime is 221201010200189. The next prime is 221201010200237. The reversal of 221201010200221 is 122002010102122.

It is a happy number.

It is an a-pointer prime, because the next prime (221201010200237) can be obtained adding 221201010200221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141714620316025 + 79486389884196 = 11904395^2 + 8915514^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201010200221 - 2⁵ = 221201010200189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221201010200195 and 221201010200204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221201010200321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600505100110 + 110600505100111.

It is an arithmetic number, because the mean of its divisors is an integer number (110600505100111).

Almost surely, 2^{221201010200221} is an apocalyptic number.

It is an amenable number.

221201010200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201010200221 is an equidigital number, since it uses as much as digits as its factorization.

221201010200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221201010200221 its reverse (122002010102122), we get a palindrome (343203020302343).

The spelling of 221201010200221 in words is "two hundred twenty-one trillion, two hundred one billion, ten million, two hundred thousand, two hundred twenty-one".