221423302201 has 4 divisors (see below), whose sum is σ = 227407715812. Its totient is φ = 215438888592.

The previous prime is 221423302181. The next prime is 221423302291. The reversal of 221423302201 is 102203324122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102203324122 = 2 ⋅51101662061.

It can be written as a sum of positive squares in 2 ways, for example, as 176362202025 + 45061100176 = 419955^2 + 212276^2 .

It is a cyclic number.

It is not a de Polignac number, because 221423302201 - 2⁵ = 221423302169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221423302291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2992206750 + ... + 2992206823.

It is an arithmetic number, because the mean of its divisors is an integer number (56851928953).

Almost surely, 2^221423302201 is an apocalyptic number.

It is an amenable number.

221423302201 is a deficient number, since it is larger than the sum of its proper divisors (5984413611).

221423302201 is an equidigital number, since it uses as much as digits as its factorization.

221423302201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5984413610.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221423302201 its reverse (102203324122), we get a palindrome (323626626323).

The spelling of 221423302201 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred two thousand, two hundred one".