1200112221 has 32 divisors (see below), whose sum is σ = 1997918208. Its totient is φ = 622520640.

The previous prime is 1200112183. The next prime is 1200112237. The reversal of 1200112221 is 1222110021.

It is not a de Polignac number, because 1200112221 - 2¹⁰ = 1200111197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200112197 and 1200112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112721) 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 31 ways as a sum of consecutive naturals, for example, 171436 + ... + 178298.

It is an arithmetic number, because the mean of its divisors is an integer number (62434944).

Almost surely, 2^1200112221 is an apocalyptic number.

1200112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200112221 is a deficient number, since it is larger than the sum of its proper divisors (797805987).

1200112221 is a wasteful number, since it uses less digits than its factorization.

1200112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7641.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1200112221 is about 34642.6358841241. The cubic root of 1200112221 is about 1062.6916938743.

Adding to 1200112221 its reverse (1222110021), we get a palindrome (2422222242).

The spelling of 1200112221 in words is "one billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".