1201001211 has 6 divisors (see below), whose sum is σ = 1734779540. Its totient is φ = 800667468.

The previous prime is 1201001209. The next prime is 1201001231. The reversal of 1201001211 is 1121001021.

It is a happy number.

It is not a de Polignac number, because 1201001211 - 2¹ = 1201001209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 133444579 = 1201001211 / (1 + 2 + 0 + 1 + 0 + 0 + 1 + 2 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201001193 and 1201001202.

It is not an unprimeable number, because it can be changed into a prime (1201001231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66722281 + ... + 66722298.

Almost surely, 2^1201001211 is an apocalyptic number.

1201001211 is a deficient number, since it is larger than the sum of its proper divisors (533778329).

1201001211 is a wasteful number, since it uses less digits than its factorization.

1201001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133444585 (or 133444582 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1201001211 is about 34655.4643743234. The cubic root of 1201001211 is about 1062.9540274291.

Adding to 1201001211 its reverse (1121001021), we get a palindrome (2322002232).

The spelling of 1201001211 in words is "one billion, two hundred one million, one thousand, two hundred eleven".