321013020 has 24 divisors (see below), whose sum is σ = 898836624. Its totient is φ = 85603456.

The previous prime is 321012973. The next prime is 321013039. The reversal of 321013020 is 20310123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 321012987 and 321013005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675049 + ... + 2675168.

It is an arithmetic number, because the mean of its divisors is an integer number (37451526).

Almost surely, 2^321013020 is an apocalyptic number.

321013020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321013020 is an abundant number, since it is smaller than the sum of its proper divisors (577823604).

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

321013020 is a wasteful number, since it uses less digits than its factorization.

321013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350229 (or 5350227 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 321013020 is about 17916.8362162520. The cubic root of 321013020 is about 684.7113849755.

Adding to 321013020 its reverse (20310123), we get a palindrome (341323143).

The spelling of 321013020 in words is "three hundred twenty-one million, thirteen thousand, twenty".