320233302033721 has 2 divisors, whose sum is σ = 320233302033722. Its totient is φ = 320233302033720.

The previous prime is 320233302033613. The next prime is 320233302033731. The reversal of 320233302033721 is 127330203332023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219868249482025 + 100365052551696 = 14827955^2 + 10018236^2 .

It is an emirp because it is prime and its reverse (127330203332023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320233302033721 - 2⁴⁷ = 179495813678393 is a prime.

It is a super-2 number, since 2×320233302033721² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320233302033731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160116651016860 + 160116651016861.

It is an arithmetic number, because the mean of its divisors is an integer number (160116651016861).

Almost surely, 2^{320233302033721} is an apocalyptic number.

It is an amenable number.

320233302033721 is a deficient number, since it is larger than the sum of its proper divisors (1).

320233302033721 is an equidigital number, since it uses as much as digits as its factorization.

320233302033721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 34.

Adding to 320233302033721 its reverse (127330203332023), we get a palindrome (447563505365744).

The spelling of 320233302033721 in words is "three hundred twenty trillion, two hundred thirty-three billion, three hundred two million, thirty-three thousand, seven hundred twenty-one".