221312212223 has 2 divisors, whose sum is σ = 221312212224. Its totient is φ = 221312212222.

The previous prime is 221312212207. The next prime is 221312212237. The reversal of 221312212223 is 322212213122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221312212223 - 2⁴ = 221312212207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221312212243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656106111 + 110656106112.

It is an arithmetic number, because the mean of its divisors is an integer number (110656106112).

Almost surely, 2^221312212223 is an apocalyptic number.

221312212223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312212223 is an equidigital number, since it uses as much as digits as its factorization.

221312212223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

Adding to 221312212223 its reverse (322212213122), we get a palindrome (543524425345).

The spelling of 221312212223 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty-three".