320253341021 has 4 divisors (see below), whose sum is σ = 320255001372. Its totient is φ = 320251680672.

The previous prime is 320253340997. The next prime is 320253341063. The reversal of 320253341021 is 120143352023.

It is a happy number.

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 269138913796 + 51114427225 = 518786^2 + 226085^2 .

It is a cyclic number.

It is not a de Polignac number, because 320253341021 - 2¹⁸ = 320253078877 is a prime.

It is a super-2 number, since 2×320253341021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320253341081) 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, 496016 + ... + 941561.

It is an arithmetic number, because the mean of its divisors is an integer number (80063750343).

Almost surely, 2^320253341021 is an apocalyptic number.

It is an amenable number.

320253341021 is a deficient number, since it is larger than the sum of its proper divisors (1660351).

320253341021 is a wasteful number, since it uses less digits than its factorization.

320253341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660350.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 320253341021 its reverse (120143352023), we get a palindrome (440396693044).

The spelling of 320253341021 in words is "three hundred twenty billion, two hundred fifty-three million, three hundred forty-one thousand, twenty-one".