1221241404017 has 2 divisors, whose sum is σ = 1221241404018. Its totient is φ = 1221241404016.

The previous prime is 1221241404007. The next prime is 1221241404109. The reversal of 1221241404017 is 7104041421221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 985326228496 + 235915175521 = 992636^2 + 485711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221241404017 - 2⁴ = 1221241404001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221241404007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610620702008 + 610620702009.

It is an arithmetic number, because the mean of its divisors is an integer number (610620702009).

Almost surely, 2^{1221241404017} is an apocalyptic number.

It is an amenable number.

1221241404017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221241404017 is an equidigital number, since it uses as much as digits as its factorization.

1221241404017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 29.

Adding to 1221241404017 its reverse (7104041421221), we get a palindrome (8325282825238).

The spelling of 1221241404017 in words is "one trillion, two hundred twenty-one billion, two hundred forty-one million, four hundred four thousand, seventeen".