1227895122889 has 2 divisors, whose sum is σ = 1227895122890. Its totient is φ = 1227895122888.

The previous prime is 1227895122859. The next prime is 1227895122913. The reversal of 1227895122889 is 9882215987221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227741561225 + 153561664 = 1108035^2 + 12392^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227895122889 - 2²³ = 1227886734281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1227895122889.

It is not a weakly prime, because it can be changed into another prime (1227895122859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613947561444 + 613947561445.

It is an arithmetic number, because the mean of its divisors is an integer number (613947561445).

Almost surely, 2^{1227895122889} is an apocalyptic number.

It is an amenable number.

1227895122889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227895122889 is an equidigital number, since it uses as much as digits as its factorization.

1227895122889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23224320, while the sum is 64.

The spelling of 1227895122889 in words is "one trillion, two hundred twenty-seven billion, eight hundred ninety-five million, one hundred twenty-two thousand, eight hundred eighty-nine".