1200101999989 has 2 divisors, whose sum is σ = 1200101999990. Its totient is φ = 1200101999988.

The previous prime is 1200101999963. The next prime is 1200102000001. The reversal of 1200101999989 is 9899991010021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199116981764 + 985018225 = 1095042^2 + 31385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200101999989 - 2⁹ = 1200101999477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200101999689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600050999994 + 600050999995.

It is an arithmetic number, because the mean of its divisors is an integer number (600050999995).

Almost surely, 2^{1200101999989} is an apocalyptic number.

It is an amenable number.

1200101999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200101999989 is an equidigital number, since it uses as much as digits as its factorization.

1200101999989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 58.

The spelling of 1200101999989 in words is "one trillion, two hundred billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred eighty-nine".