221000010101201 has 2 divisors, whose sum is σ = 221000010101202. Its totient is φ = 221000010101200.

The previous prime is 221000010101173. The next prime is 221000010101207. The reversal of 221000010101201 is 102101010000122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190216643529025 + 30783366572176 = 13791905^2 + 5548276^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000010101201 - 2³⁸ = 220725132194257 is a prime.

It is not a weakly prime, because it can be changed into another prime (221000010101207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500005050600 + 110500005050601.

It is an arithmetic number, because the mean of its divisors is an integer number (110500005050601).

Almost surely, 2^{221000010101201} is an apocalyptic number.

It is an amenable number.

221000010101201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000010101201 is an equidigital number, since it uses as much as digits as its factorization.

221000010101201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221000010101201 its reverse (102101010000122), we get a palindrome (323101020101323).

The spelling of 221000010101201 in words is "two hundred twenty-one trillion, ten million, one hundred one thousand, two hundred one".