1121646217 has 2 divisors, whose sum is σ = 1121646218. Its totient is φ = 1121646216.

The previous prime is 1121646167. The next prime is 1121646269. The reversal of 1121646217 is 7126461211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639887616 + 481758601 = 25296^2 + 21949^2 .

It is an emirp because it is prime and its reverse (7126461211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121646217 - 2⁷ = 1121646089 is a prime.

It is a super-3 number, since 3×1121646217³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1121646277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560823108 + 560823109.

It is an arithmetic number, because the mean of its divisors is an integer number (560823109).

Almost surely, 2^1121646217 is an apocalyptic number.

It is an amenable number.

1121646217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121646217 is an equidigital number, since it uses as much as digits as its factorization.

1121646217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 1121646217 is about 33490.9871010097. The cubic root of 1121646217 is about 1039.0073791463.

The spelling of 1121646217 in words is "one billion, one hundred twenty-one million, six hundred forty-six thousand, two hundred seventeen".