320132021221 has 2 divisors, whose sum is σ = 320132021222. Its totient is φ = 320132021220.

The previous prime is 320132021219. The next prime is 320132021227. The reversal of 320132021221 is 122120231023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240712890625 + 79419130596 = 490625^2 + 281814^2 .

It is a cyclic number.

It is not a de Polignac number, because 320132021221 - 2¹ = 320132021219 is a prime.

It is a super-2 number, since 2×320132021221² (a number of 24 digits) contains 22 as substring.

Together with 320132021219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320132021227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160066010610 + 160066010611.

It is an arithmetic number, because the mean of its divisors is an integer number (160066010611).

Almost surely, 2^320132021221 is an apocalyptic number.

It is an amenable number.

320132021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

320132021221 is an equidigital number, since it uses as much as digits as its factorization.

320132021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 320132021221 its reverse (122120231023), we get a palindrome (442252252244).

The spelling of 320132021221 in words is "three hundred twenty billion, one hundred thirty-two million, twenty-one thousand, two hundred twenty-one".