212221321223 has 2 divisors, whose sum is σ = 212221321224. Its totient is φ = 212221321222.

The previous prime is 212221321219. The next prime is 212221321253. The reversal of 212221321223 is 322123122212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212221321223 - 2² = 212221321219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221321253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110660611 + 106110660612.

It is an arithmetic number, because the mean of its divisors is an integer number (106110660612).

Almost surely, 2^212221321223 is an apocalyptic number.

212221321223 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221321223 is an equidigital number, since it uses as much as digits as its factorization.

212221321223 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 212221321223 its reverse (322123122212), we get a palindrome (534344443435).

The spelling of 212221321223 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-three".