312330310221 has 4 divisors (see below), whose sum is σ = 416440413632. Its totient is φ = 208220206812.

The previous prime is 312330310219. The next prime is 312330310223. The reversal of 312330310221 is 122013033213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122013033213 = 3 ⋅40671011071.

It is an interprime number because it is at equal distance from previous prime (312330310219) and next prime (312330310223).

It is not a de Polignac number, because 312330310221 - 2¹ = 312330310219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312330310223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52055051701 + ... + 52055051706.

It is an arithmetic number, because the mean of its divisors is an integer number (104110103408).

Almost surely, 2^312330310221 is an apocalyptic number.

It is an amenable number.

312330310221 is a deficient number, since it is larger than the sum of its proper divisors (104110103411).

312330310221 is a wasteful number, since it uses less digits than its factorization.

312330310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104110103410.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 312330310221 its reverse (122013033213), we get a palindrome (434343343434).

The spelling of 312330310221 in words is "three hundred twelve billion, three hundred thirty million, three hundred ten thousand, two hundred twenty-one".