1001200999 has 2 divisors, whose sum is σ = 1001201000. Its totient is φ = 1001200998.

The previous prime is 1001200969. The next prime is 1001201027. The reversal of 1001200999 is 9990021001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001200999 - 2¹¹ = 1001198951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001200999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001200939) 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, 500600499 + 500600500.

It is an arithmetic number, because the mean of its divisors is an integer number (500600500).

Almost surely, 2^1001200999 is an apocalyptic number.

1001200999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001200999 is an equidigital number, since it uses as much as digits as its factorization.

1001200999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1001200999 is about 31641.7603650619. The cubic root of 1001200999 is about 1000.4001728403.

The spelling of 1001200999 in words is "one billion, one million, two hundred thousand, nine hundred ninety-nine".