221311312223 has 2 divisors, whose sum is σ = 221311312224. Its totient is φ = 221311312222.

The previous prime is 221311312063. The next prime is 221311312267. The reversal of 221311312223 is 322213113122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221311312223 - 2¹⁴ = 221311295839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221311312423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655656111 + 110655656112.

It is an arithmetic number, because the mean of its divisors is an integer number (110655656112).

Almost surely, 2^221311312223 is an apocalyptic number.

221311312223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311312223 is an equidigital number, since it uses as much as digits as its factorization.

221311312223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

Adding to 221311312223 its reverse (322213113122), we get a palindrome (543524425345).

The spelling of 221311312223 in words is "two hundred twenty-one billion, three hundred eleven million, three hundred twelve thousand, two hundred twenty-three".