321200012 has 24 divisors (see below), whose sum is σ = 653291520. Its totient is φ = 135323280.

The previous prime is 321199993. The next prime is 321200051. The reversal of 321200012 is 210002123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321199966 and 321200002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95564 + ... + 98867.

It is an arithmetic number, because the mean of its divisors is an integer number (27220480).

Almost surely, 2^321200012 is an apocalyptic number.

It is an amenable number.

321200012 is an abundant number, since it is smaller than the sum of its proper divisors (332091508).

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

321200012 is a wasteful number, since it uses less digits than its factorization.

321200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194501 (or 194499 counting only the distinct ones).

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

The square root of 321200012 is about 17922.0537885589. The cubic root of 321200012 is about 684.8443086586.

Adding to 321200012 its reverse (210002123), we get a palindrome (531202135).

The spelling of 321200012 in words is "three hundred twenty-one million, two hundred thousand, twelve".