32311230221 has 2 divisors, whose sum is σ = 32311230222. Its totient is φ = 32311230220.

The previous prime is 32311230199. The next prime is 32311230223. The reversal of 32311230221 is 12203211323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24028410121 + 8282820100 = 155011^2 + 91010^2 .

It is a cyclic number.

It is not a de Polignac number, because 32311230221 - 2³⁰ = 31237488397 is a prime.

It is a Sophie Germain prime.

Together with 32311230223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 32311230193 and 32311230202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32311230223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16155615110 + 16155615111.

It is an arithmetic number, because the mean of its divisors is an integer number (16155615111).

Almost surely, 2^32311230221 is an apocalyptic number.

It is an amenable number.

32311230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32311230221 is an equidigital number, since it uses as much as digits as its factorization.

32311230221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 32311230221 its reverse (12203211323), we get a palindrome (44514441544).

The spelling of 32311230221 in words is "thirty-two billion, three hundred eleven million, two hundred thirty thousand, two hundred twenty-one".