221222401775801 has 2 divisors, whose sum is σ = 221222401775802. Its totient is φ = 221222401775800.

The previous prime is 221222401775773. The next prime is 221222401775863. The reversal of 221222401775801 is 108577104222122.

It is a happy number.

221222401775801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184274543450176 + 36947858325625 = 13574776^2 + 6078475^2 .

It is a cyclic number.

It is not a de Polignac number, because 221222401775801 - 2⁶ = 221222401775737 is a prime.

It is not a weakly prime, because it can be changed into another prime (221222401715801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611200887900 + 110611200887901.

It is an arithmetic number, because the mean of its divisors is an integer number (110611200887901).

Almost surely, 2^{221222401775801} is an apocalyptic number.

It is an amenable number.

221222401775801 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222401775801 is an equidigital number, since it uses as much as digits as its factorization.

221222401775801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 44.

Adding to 221222401775801 its reverse (108577104222122), we get a palindrome (329799505997923).

The spelling of 221222401775801 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, four hundred one million, seven hundred seventy-five thousand, eight hundred one".