320021212 has 48 divisors (see below), whose sum is σ = 653909760. Its totient is φ = 134209152.

The previous prime is 320021201. The next prime is 320021231. The reversal of 320021212 is 212120023.

It is a super-2 number, since 2×320021212² = 204827152259897888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320021192 and 320021201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335328 + ... + 336280.

It is an arithmetic number, because the mean of its divisors is an integer number (13623120).

Almost surely, 2^320021212 is an apocalyptic number.

It is an amenable number.

320021212 is an abundant number, since it is smaller than the sum of its proper divisors (333888548).

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

320021212 is a wasteful number, since it uses less digits than its factorization.

320021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 320021212 is about 17889.1367035975. The cubic root of 320021212 is about 684.0054916742.

Adding to 320021212 its reverse (212120023), we get a palindrome (532141235).

The spelling of 320021212 in words is "three hundred twenty million, twenty-one thousand, two hundred twelve".