1200323129989 has 2 divisors, whose sum is σ = 1200323129990. Its totient is φ = 1200323129988.

The previous prime is 1200323129987. The next prime is 1200323130053. The reversal of 1200323129989 is 9899213230021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995076076225 + 205247053764 = 997535^2 + 453042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200323129989 - 2¹ = 1200323129987 is a prime.

It is a super-2 number, since 2×1200323129989² (a number of 25 digits) contains 22 as substring.

Together with 1200323129987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200323129981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600161564994 + 600161564995.

It is an arithmetic number, because the mean of its divisors is an integer number (600161564995).

Almost surely, 2^{1200323129989} is an apocalyptic number.

It is an amenable number.

1200323129989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200323129989 is an equidigital number, since it uses as much as digits as its factorization.

1200323129989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 1200323129989 in words is "one trillion, two hundred billion, three hundred twenty-three million, one hundred twenty-nine thousand, nine hundred eighty-nine".