1212322313 has 2 divisors, whose sum is σ = 1212322314. Its totient is φ = 1212322312.

The previous prime is 1212322273. The next prime is 1212322327. The reversal of 1212322313 is 3132232121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113757129 + 98565184 = 33373^2 + 9928^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212322313 - 2²⁰ = 1211273737 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 (1212322333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606161156 + 606161157.

It is an arithmetic number, because the mean of its divisors is an integer number (606161157).

Almost surely, 2^1212322313 is an apocalyptic number.

It is an amenable number.

1212322313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212322313 is an equidigital number, since it uses as much as digits as its factorization.

1212322313 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1212322313 is about 34818.4191628511. The cubic root of 1212322313 is about 1066.2835261424.

Adding to 1212322313 its reverse (3132232121), we get a palindrome (4344554434).

The spelling of 1212322313 in words is "one billion, two hundred twelve million, three hundred twenty-two thousand, three hundred thirteen".