1200019912 has 32 divisors (see below), whose sum is σ = 2769278400. Its totient is φ = 474732864.

The previous prime is 1200019907. The next prime is 1200019921. The reversal of 1200019912 is 2199100021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823462 + ... + 824917.

It is an arithmetic number, because the mean of its divisors is an integer number (86539950).

Almost surely, 2^1200019912 is an apocalyptic number.

It is an amenable number.

1200019912 is an abundant number, since it is smaller than the sum of its proper divisors (1569258488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200019912 is a wasteful number, since it uses less digits than its factorization.

1200019912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648405 (or 1648401 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1200019912 is about 34641.3035551493. The cubic root of 1200019912 is about 1062.6644468327.

Adding to 1200019912 its reverse (2199100021), we get a palindrome (3399119933).

The spelling of 1200019912 in words is "one billion, two hundred million, nineteen thousand, nine hundred twelve".