1210821713 has 2 divisors, whose sum is σ = 1210821714. Its totient is φ = 1210821712.

The previous prime is 1210821641. The next prime is 1210821739. The reversal of 1210821713 is 3171280121.

It is an a-pointer prime, because the next prime (1210821739) can be obtained adding 1210821713 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1208813824 + 2007889 = 34768^2 + 1417^2 .

It is an emirp because it is prime and its reverse (3171280121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210821713 - 2⁸ = 1210821457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210821793) 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, 605410856 + 605410857.

It is an arithmetic number, because the mean of its divisors is an integer number (605410857).

Almost surely, 2^1210821713 is an apocalyptic number.

It is an amenable number.

1210821713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210821713 is an equidigital number, since it uses as much as digits as its factorization.

1210821713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1210821713 is about 34796.8635511881. The cubic root of 1210821713 is about 1065.8433995969.

The spelling of 1210821713 in words is "one billion, two hundred ten million, eight hundred twenty-one thousand, seven hundred thirteen".