1210771217 has 2 divisors, whose sum is σ = 1210771218. Its totient is φ = 1210771216.

The previous prime is 1210771207. The next prime is 1210771403. The reversal of 1210771217 is 7121770121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1209926656 + 844561 = 34784^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210771217 - 2⁴ = 1210771201 is a prime.

It is a super-2 number, since 2×1210771217² = 2931933879831322178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1210771217.

It is not a weakly prime, because it can be changed into another prime (1210771207) 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, 605385608 + 605385609.

It is an arithmetic number, because the mean of its divisors is an integer number (605385609).

Almost surely, 2^1210771217 is an apocalyptic number.

It is an amenable number.

1210771217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210771217 is an equidigital number, since it uses as much as digits as its factorization.

1210771217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1372, while the sum is 29.

The square root of 1210771217 is about 34796.1379609864. The cubic root of 1210771217 is about 1065.8285827785.

The spelling of 1210771217 in words is "one billion, two hundred ten million, seven hundred seventy-one thousand, two hundred seventeen".