320202322021 has 4 divisors (see below), whose sum is σ = 320203890252. Its totient is φ = 320200753792.

The previous prime is 320202322009. The next prime is 320202322103. The reversal of 320202322021 is 120223202023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120223202023 = 811 ⋅148240693.

It can be written as a sum of positive squares in 2 ways, for example, as 237862019521 + 82340302500 = 487711^2 + 286950^2 .

It is a cyclic number.

It is not a de Polignac number, because 320202322021 - 2¹¹ = 320202319973 is a prime.

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 320202322021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320202322421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422146 + ... + 904771.

It is an arithmetic number, because the mean of its divisors is an integer number (80050972563).

Almost surely, 2^320202322021 is an apocalyptic number.

It is an amenable number.

320202322021 is a deficient number, since it is larger than the sum of its proper divisors (1568231).

320202322021 is a wasteful number, since it uses less digits than its factorization.

320202322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568230.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 320202322021 its reverse (120223202023), we get a palindrome (440425524044).

The spelling of 320202322021 in words is "three hundred twenty billion, two hundred two million, three hundred twenty-two thousand, twenty-one".