221323302241 has 2 divisors, whose sum is σ = 221323302242. Its totient is φ = 221323302240.

The previous prime is 221323302197. The next prime is 221323302281. The reversal of 221323302241 is 142203323122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132790275216 + 88533027025 = 364404^2 + 297545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221323302241 is a prime.

It is a super-3 number, since 3×221323302241³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (221323302281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110661651120 + 110661651121.

It is an arithmetic number, because the mean of its divisors is an integer number (110661651121).

Almost surely, 2^221323302241 is an apocalyptic number.

It is an amenable number.

221323302241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221323302241 is an equidigital number, since it uses as much as digits as its factorization.

221323302241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 221323302241 its reverse (142203323122), we get a palindrome (363526625363).

The spelling of 221323302241 in words is "two hundred twenty-one billion, three hundred twenty-three million, three hundred two thousand, two hundred forty-one".