1222321213 has 2 divisors, whose sum is σ = 1222321214. Its totient is φ = 1222321212.

The previous prime is 1222321211. The next prime is 1222321297. The reversal of 1222321213 is 3121232221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 754161444 + 468159769 = 27462^2 + 21637^2 .

It is an emirp because it is prime and its reverse (3121232221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222321213 - 2¹ = 1222321211 is a prime.

Together with 1222321211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222321211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611160606 + 611160607.

It is an arithmetic number, because the mean of its divisors is an integer number (611160607).

Almost surely, 2^1222321213 is an apocalyptic number.

It is an amenable number.

1222321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222321213 is an equidigital number, since it uses as much as digits as its factorization.

1222321213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 1222321213 is about 34961.7106703891. The cubic root of 1222321213 is about 1069.2069743392.

Adding to 1222321213 its reverse (3121232221), we get a palindrome (4343553434).

The spelling of 1222321213 in words is "one billion, two hundred twenty-two million, three hundred twenty-one thousand, two hundred thirteen".