1211331133 has 16 divisors (see below), whose sum is σ = 1286119296. Its totient is φ = 1138540480.

The previous prime is 1211331119. The next prime is 1211331151. The reversal of 1211331133 is 3311331121.

It is not a de Polignac number, because 1211331133 - 2²¹ = 1209233981 is a prime.

It is a super-2 number, since 2×1211331133² = 2934646227550127378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211331133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211331533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374463 + ... + 377683.

It is an arithmetic number, because the mean of its divisors is an integer number (80382456).

Almost surely, 2^1211331133 is an apocalyptic number.

It is an amenable number.

1211331133 is a deficient number, since it is larger than the sum of its proper divisors (74788163).

1211331133 is a wasteful number, since it uses less digits than its factorization.

1211331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524.

The product of its digits is 162, while the sum is 19.

The square root of 1211331133 is about 34804.1826940384. The cubic root of 1211331133 is about 1065.9928534241.

Adding to 1211331133 its reverse (3311331121), we get a palindrome (4522662254).

The spelling of 1211331133 in words is "one billion, two hundred eleven million, three hundred thirty-one thousand, one hundred thirty-three".