1212323317 has 2 divisors, whose sum is σ = 1212323318. Its totient is φ = 1212323316.

The previous prime is 1212323309. The next prime is 1212323369. The reversal of 1212323317 is 7133232121.

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., 790678161 + 421645156 = 28119^2 + 20534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212323317 - 2³ = 1212323309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212323291 and 1212323300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212323017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606161658 + 606161659.

It is an arithmetic number, because the mean of its divisors is an integer number (606161659).

Almost surely, 2^1212323317 is an apocalyptic number.

It is an amenable number.

1212323317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212323317 is an equidigital number, since it uses as much as digits as its factorization.

1212323317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 1212323317 is about 34818.4335805045. The cubic root of 1212323317 is about 1066.2838204944.

Adding to 1212323317 its reverse (7133232121), we get a palindrome (8345555438).

The spelling of 1212323317 in words is "one billion, two hundred twelve million, three hundred twenty-three thousand, three hundred seventeen".