312213314243321 has 16 divisors (see below), whose sum is σ = 316267432685568. Its totient is φ = 308190419082000.

The previous prime is 312213314243291. The next prime is 312213314243333. The reversal of 312213314243321 is 123342413312213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 312213314243321 - 2³⁸ = 311938436336377 is a prime.

It is a super-2 number, since 2×312213314243321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312213314243381) 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, 9943886 + ... + 26894376.

It is an arithmetic number, because the mean of its divisors is an integer number (19766714542848).

Almost surely, 2^{312213314243321} is an apocalyptic number.

It is an amenable number.

312213314243321 is a deficient number, since it is larger than the sum of its proper divisors (4054118442247).

312213314243321 is a wasteful number, since it uses less digits than its factorization.

312213314243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16951412.

The product of its digits is 62208, while the sum is 35.

Adding to 312213314243321 its reverse (123342413312213), we get a palindrome (435555727555534).

The spelling of 312213314243321 in words is "three hundred twelve trillion, two hundred thirteen billion, three hundred fourteen million, two hundred forty-three thousand, three hundred twenty-one".