212221111213 has 2 divisors, whose sum is σ = 212221111214. Its totient is φ = 212221111212.

The previous prime is 212221111189. The next prime is 212221111231. The reversal of 212221111213 is 312111122212.

Together with next prime (212221111231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205044141124 + 7176970089 = 452818^2 + 84717^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221111213 - 2⁵ = 212221111181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221111913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110555606 + 106110555607.

It is an arithmetic number, because the mean of its divisors is an integer number (106110555607).

Almost surely, 2^212221111213 is an apocalyptic number.

It is an amenable number.

212221111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221111213 is an equidigital number, since it uses as much as digits as its factorization.

212221111213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

Adding to 212221111213 its reverse (312111122212), we get a palindrome (524332233425).

The spelling of 212221111213 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".