321020552020 has 48 divisors (see below), whose sum is σ = 770658295680. Its totient is φ = 110034336384.

The previous prime is 321020551993. The next prime is 321020552023. The reversal of 321020552020 is 20255020123.

It is a junction number, because it is equal to n+sod(n) for n = 321020551982 and 321020552000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321020552023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210147 + ... + 828373.

It is an arithmetic number, because the mean of its divisors is an integer number (16055381160).

Almost surely, 2^321020552020 is an apocalyptic number.

It is an amenable number.

321020552020 is an abundant number, since it is smaller than the sum of its proper divisors (449637743660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321020552020 is a wasteful number, since it uses less digits than its factorization.

321020552020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621952 (or 621950 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 321020552020 its reverse (20255020123), we get a palindrome (341275572143).

The spelling of 321020552020 in words is "three hundred twenty-one billion, twenty million, five hundred fifty-two thousand, twenty".