221303120317 has 2 divisors, whose sum is σ = 221303120318. Its totient is φ = 221303120316.

The previous prime is 221303120287. The next prime is 221303120393. The reversal of 221303120317 is 713021303122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160888429881 + 60414690436 = 401109^2 + 245794^2 .

It is a cyclic number.

It is not a de Polignac number, because 221303120317 - 2⁷ = 221303120189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221303120291 and 221303120300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221301120317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110651560158 + 110651560159.

It is an arithmetic number, because the mean of its divisors is an integer number (110651560159).

Almost surely, 2^221303120317 is an apocalyptic number.

It is an amenable number.

221303120317 is a deficient number, since it is larger than the sum of its proper divisors (1).

221303120317 is an equidigital number, since it uses as much as digits as its factorization.

221303120317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 221303120317 its reverse (713021303122), we get a palindrome (934324423439).

The spelling of 221303120317 in words is "two hundred twenty-one billion, three hundred three million, one hundred twenty thousand, three hundred seventeen".