312444421421 has 12 divisors (see below), whose sum is σ = 363632450076. Its totient is φ = 267332123520.

The previous prime is 312444421417. The next prime is 312444421463. The reversal of 312444421421 is 124124444213.

It can be written as a sum of positive squares in 2 ways, for example, as 132168602500 + 180275818921 = 363550^2 + 424589^2 .

It is not a de Polignac number, because 312444421421 - 2² = 312444421417 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 (312444421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75944570 + ... + 75948683.

It is an arithmetic number, because the mean of its divisors is an integer number (30302704173).

Almost surely, 2^312444421421 is an apocalyptic number.

It is an amenable number.

312444421421 is a deficient number, since it is larger than the sum of its proper divisors (51188028655).

312444421421 is a wasteful number, since it uses less digits than its factorization.

312444421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151893292 (or 151893281 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

Adding to 312444421421 its reverse (124124444213), we get a palindrome (436568865634).

The spelling of 312444421421 in words is "three hundred twelve billion, four hundred forty-four million, four hundred twenty-one thousand, four hundred twenty-one".