611221220017 has 2 divisors, whose sum is σ = 611221220018. Its totient is φ = 611221220016.

The previous prime is 611221219993. The next prime is 611221220047. The reversal of 611221220017 is 710022122116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605340017296 + 5881202721 = 778036^2 + 76689^2 .

It is a cyclic number.

It is not a de Polignac number, because 611221220017 - 2²³ = 611212831409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 611221219973 and 611221220000.

It is not a weakly prime, because it can be changed into another prime (611221220047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305610610008 + 305610610009.

It is an arithmetic number, because the mean of its divisors is an integer number (305610610009).

Almost surely, 2^611221220017 is an apocalyptic number.

It is an amenable number.

611221220017 is a deficient number, since it is larger than the sum of its proper divisors (1).

611221220017 is an equidigital number, since it uses as much as digits as its factorization.

611221220017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 611221220017 in words is "six hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, seventeen".