1200099109 has 16 divisors (see below), whose sum is σ = 1398689280. Its totient is φ = 1018139760.

The previous prime is 1200099101. The next prime is 1200099133. The reversal of 1200099109 is 9019900021.

It is not a de Polignac number, because 1200099109 - 2³ = 1200099101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200099101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28849 + ... + 56854.

It is an arithmetic number, because the mean of its divisors is an integer number (87418080).

Almost surely, 2^1200099109 is an apocalyptic number.

1200099109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1200099109 is a deficient number, since it is larger than the sum of its proper divisors (198590171).

1200099109 is a wasteful number, since it uses less digits than its factorization.

1200099109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85800.

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

The square root of 1200099109 is about 34642.4466370376. The cubic root of 1200099109 is about 1062.6878236628.

The spelling of 1200099109 in words is "one billion, two hundred million, ninety-nine thousand, one hundred nine".