221212134223 has 2 divisors, whose sum is σ = 221212134224. Its totient is φ = 221212134222.

The previous prime is 221212134203. The next prime is 221212134239. The reversal of 221212134223 is 322431212122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221212134223 - 2²¹ = 221210037071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221212134203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606067111 + 110606067112.

It is an arithmetic number, because the mean of its divisors is an integer number (110606067112).

Almost surely, 2^221212134223 is an apocalyptic number.

221212134223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212134223 is an equidigital number, since it uses as much as digits as its factorization.

221212134223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

Adding to 221212134223 its reverse (322431212122), we get a palindrome (543643346345).

The spelling of 221212134223 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred thirty-four thousand, two hundred twenty-three".