321020012 has 12 divisors (see below), whose sum is σ = 562299360. Its totient is φ = 160363056.

The previous prime is 321019967. The next prime is 321020017. The reversal of 321020012 is 210020123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321019975 and 321020002.

It is not an unprimeable number, because it can be changed into a prime (321020017) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31748 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (46858280).

Almost surely, 2^321020012 is an apocalyptic number.

It is an amenable number.

321020012 is a deficient number, since it is larger than the sum of its proper divisors (241279348).

321020012 is a wasteful number, since it uses less digits than its factorization.

321020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73480 (or 73478 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 321020012 is about 17917.0313389244. The cubic root of 321020012 is about 684.7163561832.

Adding to 321020012 its reverse (210020123), we get a palindrome (531040135).

The spelling of 321020012 in words is "three hundred twenty-one million, twenty thousand, twelve".