221001222220201 has 2 divisors, whose sum is σ = 221001222220202. Its totient is φ = 221001222220200.

The previous prime is 221001222220183. The next prime is 221001222220223. The reversal of 221001222220201 is 102022222100122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220040910418176 + 960311802025 = 14833776^2 + 979955^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001222220201 - 2⁵ = 221001222220169 is a prime.

It is not a weakly prime, because it can be changed into another prime (221001222220901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500611110100 + 110500611110101.

It is an arithmetic number, because the mean of its divisors is an integer number (110500611110101).

Almost surely, 2^{221001222220201} is an apocalyptic number.

It is an amenable number.

221001222220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001222220201 is an equidigital number, since it uses as much as digits as its factorization.

221001222220201 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 221001222220201 its reverse (102022222100122), we get a palindrome (323023444320323).

The spelling of 221001222220201 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred one".