1289204368901 has 2 divisors, whose sum is σ = 1289204368902. Its totient is φ = 1289204368900.

The previous prime is 1289204368889. The next prime is 1289204368931. The reversal of 1289204368901 is 1098634029821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771885244900 + 517319124001 = 878570^2 + 719249^2 .

It is an emirp because it is prime and its reverse (1098634029821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1289204368901 - 2¹⁰ = 1289204367877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1289204368931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644602184450 + 644602184451.

It is an arithmetic number, because the mean of its divisors is an integer number (644602184451).

Almost surely, 2^{1289204368901} is an apocalyptic number.

It is an amenable number.

1289204368901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289204368901 is an equidigital number, since it uses as much as digits as its factorization.

1289204368901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 1289204368901 in words is "one trillion, two hundred eighty-nine billion, two hundred four million, three hundred sixty-eight thousand, nine hundred one".