320203132223221 has 4 divisors (see below), whose sum is σ = 344834142394252. Its totient is φ = 295572122052192.

The previous prime is 320203132223041. The next prime is 320203132223237. The reversal of 320203132223221 is 122322231302023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213671627835121 + 106531504388100 = 14617511^2 + 10321410^2 .

It is a cyclic number.

It is not a de Polignac number, because 320203132223221 - 2¹¹ = 320203132221173 is a prime.

It is a super-2 number, since 2×320203132223221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320203132223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320203132223021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12315505085496 + ... + 12315505085521.

It is an arithmetic number, because the mean of its divisors is an integer number (86208535598563).

Almost surely, 2^{320203132223221} is an apocalyptic number.

It is an amenable number.

320203132223221 is a deficient number, since it is larger than the sum of its proper divisors (24631010171031).

320203132223221 is a wasteful number, since it uses less digits than its factorization.

320203132223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24631010171030.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 320203132223221 its reverse (122322231302023), we get a palindrome (442525363525244).

The spelling of 320203132223221 in words is "three hundred twenty trillion, two hundred three billion, one hundred thirty-two million, two hundred twenty-three thousand, two hundred twenty-one".