321201312 has 24 divisors (see below), whose sum is σ = 843153696. Its totient is φ = 107067072.

The previous prime is 321201301. The next prime is 321201317. The reversal of 321201312 is 213102123.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 321201291 and 321201300.

It is not an unprimeable number, because it can be changed into a prime (321201317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672828 + ... + 1673019.

It is an arithmetic number, because the mean of its divisors is an integer number (35131404).

Almost surely, 2^321201312 is an apocalyptic number.

321201312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321201312 is an abundant number, since it is smaller than the sum of its proper divisors (521952384).

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

321201312 is a wasteful number, since it uses less digits than its factorization.

321201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345860 (or 3345852 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 321201312 is about 17922.0900566870. The cubic root of 321201312 is about 684.8452325859.

Adding to 321201312 its reverse (213102123), we get a palindrome (534303435).

The spelling of 321201312 in words is "three hundred twenty-one million, two hundred one thousand, three hundred twelve".