1200021412 has 24 divisors (see below), whose sum is σ = 2193803136. Its totient is φ = 573279168.

The previous prime is 1200021401. The next prime is 1200021451. The reversal of 1200021412 is 2141200021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200021392 and 1200021401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80833 + ... + 94519.

It is an arithmetic number, because the mean of its divisors is an integer number (91408464).

Almost surely, 2^1200021412 is an apocalyptic number.

It is an amenable number.

1200021412 is a deficient number, since it is larger than the sum of its proper divisors (993781724).

1200021412 is a wasteful number, since it uses less digits than its factorization.

1200021412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14667 (or 14665 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1200021412 is about 34641.3252055980. The cubic root of 1200021412 is about 1062.6648896020.

Adding to 1200021412 its reverse (2141200021), we get a palindrome (3341221433).

The spelling of 1200021412 in words is "one billion, two hundred million, twenty-one thousand, four hundred twelve".