312020030321 has 16 divisors (see below), whose sum is σ = 329136120000. Its totient is φ = 294973949376.

The previous prime is 312020030317. The next prime is 312020030347. The reversal of 312020030321 is 123030020213.

It is not a de Polignac number, because 312020030321 - 2² = 312020030317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312020030321.

It is not an unprimeable number, because it can be changed into a prime (312020030521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21263375 + ... + 21278043.

It is an arithmetic number, because the mean of its divisors is an integer number (20571007500).

Almost surely, 2^312020030321 is an apocalyptic number.

It is an amenable number.

312020030321 is a deficient number, since it is larger than the sum of its proper divisors (17116089679).

312020030321 is a wasteful number, since it uses less digits than its factorization.

312020030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16976.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 312020030321 its reverse (123030020213), we get a palindrome (435050050534).

The spelling of 312020030321 in words is "three hundred twelve billion, twenty million, thirty thousand, three hundred twenty-one".