1208818401601 has 2 divisors, whose sum is σ = 1208818401602. Its totient is φ = 1208818401600.

The previous prime is 1208818401589. The next prime is 1208818401613. The reversal of 1208818401601 is 1061048188021.

It is a balanced prime because it is at equal distance from previous prime (1208818401589) and next prime (1208818401613).

It can be written as a sum of positive squares in only one way, i.e., 758545193025 + 450273208576 = 870945^2 + 671024^2 .

It is an emirp because it is prime and its reverse (1061048188021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1208818401601 - 2¹¹ = 1208818399553 is a prime.

It is a super-2 number, since 2×1208818401601² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1208818401701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604409200800 + 604409200801.

It is an arithmetic number, because the mean of its divisors is an integer number (604409200801).

Almost surely, 2^{1208818401601} is an apocalyptic number.

It is an amenable number.

1208818401601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208818401601 is an equidigital number, since it uses as much as digits as its factorization.

1208818401601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 40.

The spelling of 1208818401601 in words is "one trillion, two hundred eight billion, eight hundred eighteen million, four hundred one thousand, six hundred one".