1222123313 has 2 divisors, whose sum is σ = 1222123314. Its totient is φ = 1222123312.

The previous prime is 1222123303. The next prime is 1222123321. The reversal of 1222123313 is 3133212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005650944 + 216472369 = 31712^2 + 14713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222123313 - 2²⁶ = 1155014449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1222123303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611061656 + 611061657.

It is an arithmetic number, because the mean of its divisors is an integer number (611061657).

Almost surely, 2^1222123313 is an apocalyptic number.

It is an amenable number.

1222123313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222123313 is an equidigital number, since it uses as much as digits as its factorization.

1222123313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 1222123313 is about 34958.8803167378. The cubic root of 1222123313 is about 1069.1492678819.

Adding to 1222123313 its reverse (3133212221), we get a palindrome (4355335534).

The spelling of 1222123313 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, three hundred thirteen".