1211009713 has 2 divisors, whose sum is σ = 1211009714. Its totient is φ = 1211009712.

The previous prime is 1211009711. The next prime is 1211009717. The reversal of 1211009713 is 3179001121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 927019809 + 283989904 = 30447^2 + 16852^2 .

It is an emirp because it is prime and its reverse (3179001121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211009713 - 2¹ = 1211009711 is a prime.

Together with 1211009711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1211009711) 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, 605504856 + 605504857.

It is an arithmetic number, because the mean of its divisors is an integer number (605504857).

Almost surely, 2^1211009713 is an apocalyptic number.

It is an amenable number.

1211009713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211009713 is an equidigital number, since it uses as much as digits as its factorization.

1211009713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1211009713 is about 34799.5648392333. The cubic root of 1211009713 is about 1065.8985599857.

The spelling of 1211009713 in words is "one billion, two hundred eleven million, nine thousand, seven hundred thirteen".