1211709956827 has 2 divisors, whose sum is σ = 1211709956828. Its totient is φ = 1211709956826.

The previous prime is 1211709956797. The next prime is 1211709956839. The reversal of 1211709956827 is 7286599071121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211709956827 - 2¹¹ = 1211709954779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211709956857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605854978413 + 605854978414.

It is an arithmetic number, because the mean of its divisors is an integer number (605854978414).

Almost surely, 2^{1211709956827} is an apocalyptic number.

1211709956827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211709956827 is an equidigital number, since it uses as much as digits as its factorization.

1211709956827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 58.

The spelling of 1211709956827 in words is "one trillion, two hundred eleven billion, seven hundred nine million, nine hundred fifty-six thousand, eight hundred twenty-seven".