1221708703 has 2 divisors, whose sum is σ = 1221708704. Its totient is φ = 1221708702.

The previous prime is 1221708679. The next prime is 1221708713. The reversal of 1221708703 is 3078071221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221708703 - 2²⁵ = 1188154271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221708713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610854351 + 610854352.

It is an arithmetic number, because the mean of its divisors is an integer number (610854352).

Almost surely, 2^1221708703 is an apocalyptic number.

1221708703 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221708703 is an equidigital number, since it uses as much as digits as its factorization.

1221708703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1221708703 is about 34952.9498469013. The cubic root of 1221708703 is about 1069.0283498832.

Adding to 1221708703 its reverse (3078071221), we get a palindrome (4299779924).

The spelling of 1221708703 in words is "one billion, two hundred twenty-one million, seven hundred eight thousand, seven hundred three".