221232322247 has 2 divisors, whose sum is σ = 221232322248. Its totient is φ = 221232322246.

The previous prime is 221232322229. The next prime is 221232322249. The reversal of 221232322247 is 742223232122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221232322247 - 2⁶ = 221232322183 is a prime.

It is a super-2 number, since 2×221232322247² (a number of 23 digits) contains 22 as substring.

Together with 221232322249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232322249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616161123 + 110616161124.

It is an arithmetic number, because the mean of its divisors is an integer number (110616161124).

Almost surely, 2^221232322247 is an apocalyptic number.

221232322247 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232322247 is an equidigital number, since it uses as much as digits as its factorization.

221232322247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 32.

Adding to 221232322247 its reverse (742223232122), we get a palindrome (963455554369).

The spelling of 221232322247 in words is "two hundred twenty-one billion, two hundred thirty-two million, three hundred twenty-two thousand, two hundred forty-seven".