312030201302221 has 2 divisors, whose sum is σ = 312030201302222. Its totient is φ = 312030201302220.

The previous prime is 312030201302189. The next prime is 312030201302243. The reversal of 312030201302221 is 122203102030213.

It is an a-pointer prime, because the next prime (312030201302243) can be obtained adding 312030201302221 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311782009022500 + 248192279721 = 17657350^2 + 498189^2 .

It is an emirp because it is prime and its reverse (122203102030213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312030201302221 - 2⁵ = 312030201302189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312030201302192 and 312030201302201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312030201302251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156015100651110 + 156015100651111.

It is an arithmetic number, because the mean of its divisors is an integer number (156015100651111).

Almost surely, 2^{312030201302221} is an apocalyptic number.

It is an amenable number.

312030201302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

312030201302221 is an equidigital number, since it uses as much as digits as its factorization.

312030201302221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312030201302221 its reverse (122203102030213), we get a palindrome (434233303332434).

The spelling of 312030201302221 in words is "three hundred twelve trillion, thirty billion, two hundred one million, three hundred two thousand, two hundred twenty-one".