312203201321 has 16 divisors (see below), whose sum is σ = 341029398528. Its totient is φ = 283451283600.

The previous prime is 312203201251. The next prime is 312203201347. The reversal of 312203201321 is 123102302213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312203201321 is a prime.

It is a super-2 number, since 2×312203201321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 312203201293 and 312203201302.

It is not an unprimeable number, because it can be changed into a prime (312203221321) 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, 32038976 + ... + 32048718.

It is an arithmetic number, because the mean of its divisors is an integer number (21314337408).

Almost surely, 2^312203201321 is an apocalyptic number.

It is an amenable number.

312203201321 is a deficient number, since it is larger than the sum of its proper divisors (28826197207).

312203201321 is a wasteful number, since it uses less digits than its factorization.

312203201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13252.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312203201321 its reverse (123102302213), we get a palindrome (435305503534).

The spelling of 312203201321 in words is "three hundred twelve billion, two hundred three million, two hundred one thousand, three hundred twenty-one".