1212320663 has 2 divisors, whose sum is σ = 1212320664. Its totient is φ = 1212320662.

The previous prime is 1212320653. The next prime is 1212320671. The reversal of 1212320663 is 3660232121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212320663 - 2⁸ = 1212320407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212320623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606160331 + 606160332.

It is an arithmetic number, because the mean of its divisors is an integer number (606160332).

Almost surely, 2^1212320663 is an apocalyptic number.

1212320663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212320663 is an equidigital number, since it uses as much as digits as its factorization.

1212320663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1212320663 is about 34818.3954684876. The cubic root of 1212320663 is about 1066.2830423963.

Adding to 1212320663 its reverse (3660232121), we get a palindrome (4872552784).

The spelling of 1212320663 in words is "one billion, two hundred twelve million, three hundred twenty thousand, six hundred sixty-three".