1221132230369 has 2 divisors, whose sum is σ = 1221132230370. Its totient is φ = 1221132230368.

The previous prime is 1221132230291. The next prime is 1221132230393. The reversal of 1221132230369 is 9630322311221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1075866817600 + 145265412769 = 1037240^2 + 381137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221132230369 - 2⁸ = 1221132230113 is a prime.

It is a super-2 number, since 2×1221132230369² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1221132230569) 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, 610566115184 + 610566115185.

It is an arithmetic number, because the mean of its divisors is an integer number (610566115185).

Almost surely, 2^{1221132230369} is an apocalyptic number.

It is an amenable number.

1221132230369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221132230369 is an equidigital number, since it uses as much as digits as its factorization.

1221132230369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 1221132230369 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty thousand, three hundred sixty-nine".