321100221313 has 2 divisors, whose sum is σ = 321100221314. Its totient is φ = 321100221312.

The previous prime is 321100221271. The next prime is 321100221317. The reversal of 321100221313 is 313122001123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261032093569 + 60068127744 = 510913^2 + 245088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321100221313 is a prime.

It is a super-3 number, since 3×321100221313³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (321100221317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160550110656 + 160550110657.

It is an arithmetic number, because the mean of its divisors is an integer number (160550110657).

Almost surely, 2^321100221313 is an apocalyptic number.

It is an amenable number.

321100221313 is a deficient number, since it is larger than the sum of its proper divisors (1).

321100221313 is an equidigital number, since it uses as much as digits as its factorization.

321100221313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 321100221313 its reverse (313122001123), we get a palindrome (634222222436).

The spelling of 321100221313 in words is "three hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, three hundred thirteen".