1020200999 has 2 divisors, whose sum is σ = 1020201000. Its totient is φ = 1020200998.

The previous prime is 1020200983. The next prime is 1020201019. The reversal of 1020200999 is 9990020201.

1020200999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020200999 - 2⁴ = 1020200983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020200099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510100499 + 510100500.

It is an arithmetic number, because the mean of its divisors is an integer number (510100500).

Almost surely, 2^1020200999 is an apocalyptic number.

1020200999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020200999 is an equidigital number, since it uses as much as digits as its factorization.

1020200999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1020200999 is about 31940.5854517415. The cubic root of 1020200999 is about 1006.6888261840.

The spelling of 1020200999 in words is "one billion, twenty million, two hundred thousand, nine hundred ninety-nine".