221320110313 has 2 divisors, whose sum is σ = 221320110314. Its totient is φ = 221320110312.

The previous prime is 221320110301. The next prime is 221320110337. The reversal of 221320110313 is 313011023122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212560647849 + 8759462464 = 461043^2 + 93592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221320110313 is a prime.

It is not a weakly prime, because it can be changed into another prime (221320110383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660055156 + 110660055157.

It is an arithmetic number, because the mean of its divisors is an integer number (110660055157).

Almost surely, 2^221320110313 is an apocalyptic number.

It is an amenable number.

221320110313 is a deficient number, since it is larger than the sum of its proper divisors (1).

221320110313 is an equidigital number, since it uses as much as digits as its factorization.

221320110313 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 221320110313 its reverse (313011023122), we get a palindrome (534331133435).

The spelling of 221320110313 in words is "two hundred twenty-one billion, three hundred twenty million, one hundred ten thousand, three hundred thirteen".