320021121033 has 6 divisors (see below), whose sum is σ = 462252730394. Its totient is φ = 213347414016.

The previous prime is 320021121011. The next prime is 320021121041. The reversal of 320021121033 is 330121120023.

It can be written as a sum of positive squares in only one way, i.e., 219476321289 + 100544799744 = 468483^2 + 317088^2 .

It is not a de Polignac number, because 320021121033 - 2¹² = 320021116937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320021120997 and 320021121015.

It is not an unprimeable number, because it can be changed into a prime (320021121053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17778951160 + ... + 17778951177.

Almost surely, 2^320021121033 is an apocalyptic number.

It is an amenable number.

320021121033 is a deficient number, since it is larger than the sum of its proper divisors (142231609361).

320021121033 is a wasteful number, since it uses less digits than its factorization.

320021121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35557902343 (or 35557902340 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 320021121033 its reverse (330121120023), we get a palindrome (650142241056).

The spelling of 320021121033 in words is "three hundred twenty billion, twenty-one million, one hundred twenty-one thousand, thirty-three".