1321122017 has 2 divisors, whose sum is σ = 1321122018. Its totient is φ = 1321122016.

The previous prime is 1321121993. The next prime is 1321122029. The reversal of 1321122017 is 7102211231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847450321 + 473671696 = 29111^2 + 21764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321122017 - 2¹² = 1321117921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321122017.

It is not a weakly prime, because it can be changed into another prime (1321122217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660561008 + 660561009.

It is an arithmetic number, because the mean of its divisors is an integer number (660561009).

Almost surely, 2^1321122017 is an apocalyptic number.

It is an amenable number.

1321122017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321122017 is an equidigital number, since it uses as much as digits as its factorization.

1321122017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1321122017 is about 36347.2422200089. The cubic root of 1321122017 is about 1097.2720328776.

Adding to 1321122017 its reverse (7102211231), we get a palindrome (8423333248).

The spelling of 1321122017 in words is "one billion, three hundred twenty-one million, one hundred twenty-two thousand, seventeen".