1200001211 has 8 divisors (see below), whose sum is σ = 1220774544. Its totient is φ = 1179263520.

The previous prime is 1200001193. The next prime is 1200001247. The reversal of 1200001211 is 1121000021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200001211 - 2¹⁸ = 1199739067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200001291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64121 + ... + 80693.

It is an arithmetic number, because the mean of its divisors is an integer number (152596818).

Almost surely, 2^1200001211 is an apocalyptic number.

1200001211 is a deficient number, since it is larger than the sum of its proper divisors (20773333).

1200001211 is a wasteful number, since it uses less digits than its factorization.

1200001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17821.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200001211 is about 34641.0336306525. The cubic root of 1200001211 is about 1062.6589266490.

Adding to 1200001211 its reverse (1121000021), we get a palindrome (2321001232).

The spelling of 1200001211 in words is "one billion, two hundred million, one thousand, two hundred eleven".