221232322313 has 2 divisors, whose sum is σ = 221232322314. Its totient is φ = 221232322312.

The previous prime is 221232322249. The next prime is 221232322331. The reversal of 221232322313 is 313223232122.

Together with next prime (221232322331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139340198089 + 81892124224 = 373283^2 + 286168^2 .

It is a cyclic number.

It is not a de Polignac number, because 221232322313 - 2⁶ = 221232322249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221232322373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616161156 + 110616161157.

It is an arithmetic number, because the mean of its divisors is an integer number (110616161157).

Almost surely, 2^221232322313 is an apocalyptic number.

It is an amenable number.

221232322313 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232322313 is an equidigital number, since it uses as much as digits as its factorization.

221232322313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

Adding to 221232322313 its reverse (313223232122), we get a palindrome (534455554435).

The spelling of 221232322313 in words is "two hundred twenty-one billion, two hundred thirty-two million, three hundred twenty-two thousand, three hundred thirteen".