312203123321 has 4 divisors (see below), whose sum is σ = 312325606500. Its totient is φ = 312080640144.

The previous prime is 312203123311. The next prime is 312203123359. The reversal of 312203123321 is 123321302213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237499300921 + 74703822400 = 487339^2 + 273320^2 .

It is a cyclic number.

It is not a de Polignac number, because 312203123321 - 2⁶ = 312203123257 is a prime.

It is a super-2 number, since 2×312203123321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312203123311) 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, 61237766 + ... + 61242863.

It is an arithmetic number, because the mean of its divisors is an integer number (78081401625).

Almost surely, 2^312203123321 is an apocalyptic number.

It is an amenable number.

312203123321 is a deficient number, since it is larger than the sum of its proper divisors (122483179).

312203123321 is a wasteful number, since it uses less digits than its factorization.

312203123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122483178.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 312203123321 its reverse (123321302213), we get a palindrome (435524425534).

The spelling of 312203123321 in words is "three hundred twelve billion, two hundred three million, one hundred twenty-three thousand, three hundred twenty-one".