321002020 has 24 divisors (see below), whose sum is σ = 676678464. Its totient is φ = 127910496.

The previous prime is 321001999. The next prime is 321002023. The reversal of 321002020 is 20200123.

321002020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 321001988 and 321002006.

It is not an unprimeable number, because it can be changed into a prime (321002023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25254 + ... + 35773.

It is an arithmetic number, because the mean of its divisors is an integer number (28194936).

Almost surely, 2^321002020 is an apocalyptic number.

It is an amenable number.

321002020 is an abundant number, since it is smaller than the sum of its proper divisors (355676444).

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

321002020 is a wasteful number, since it uses less digits than its factorization.

321002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61299 (or 61297 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 321002020 is about 17916.5292397830. The cubic root of 321002020 is about 684.7035639934.

Adding to 321002020 its reverse (20200123), we get a palindrome (341202143).

The spelling of 321002020 in words is "three hundred twenty-one million, two thousand, twenty".