1223212222013 has 2 divisors, whose sum is σ = 1223212222014. Its totient is φ = 1223212222012.

The previous prime is 1223212222009. The next prime is 1223212222021. The reversal of 1223212222013 is 3102222123221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974054511364 + 249157710649 = 986942^2 + 499157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223212222013 - 2² = 1223212222009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223212222013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223212222613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611606111006 + 611606111007.

It is an arithmetic number, because the mean of its divisors is an integer number (611606111007).

Almost surely, 2^{1223212222013} is an apocalyptic number.

It is an amenable number.

1223212222013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223212222013 is an equidigital number, since it uses as much as digits as its factorization.

1223212222013 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1223212222013 its reverse (3102222123221), we get a palindrome (4325434345234).

The spelling of 1223212222013 in words is "one trillion, two hundred twenty-three billion, two hundred twelve million, two hundred twenty-two thousand, thirteen".