1012021219849 has 2 divisors, whose sum is σ = 1012021219850. Its totient is φ = 1012021219848.

The previous prime is 1012021219837. The next prime is 1012021219883. The reversal of 1012021219849 is 9489121202101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666130204224 + 345891015625 = 816168^2 + 588125^2 .

It is an emirp because it is prime and its reverse (9489121202101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012021219849 - 2⁷ = 1012021219721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012021219049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010609924 + 506010609925.

It is an arithmetic number, because the mean of its divisors is an integer number (506010609925).

Almost surely, 2^{1012021219849} is an apocalyptic number.

It is an amenable number.

1012021219849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012021219849 is an equidigital number, since it uses as much as digits as its factorization.

1012021219849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 1012021219849 in words is "one trillion, twelve billion, twenty-one million, two hundred nineteen thousand, eight hundred forty-nine".