1211021133 has 24 divisors (see below), whose sum is σ = 1879768800. Its totient is φ = 691477920.

The previous prime is 1211021117. The next prime is 1211021143. The reversal of 1211021133 is 3311201121.

It is a happy number.

1211021133 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211021133 - 2⁴ = 1211021117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263943 + ... + 268491.

It is an arithmetic number, because the mean of its divisors is an integer number (78323700).

Almost surely, 2^1211021133 is an apocalyptic number.

It is an amenable number.

1211021133 is a deficient number, since it is larger than the sum of its proper divisors (668747667).

1211021133 is a wasteful number, since it uses less digits than its factorization.

1211021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377 (or 6370 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1211021133 is about 34799.7289213580. The cubic root of 1211021133 is about 1065.9019105020.

Adding to 1211021133 its reverse (3311201121), we get a palindrome (4522222254).

The spelling of 1211021133 in words is "one billion, two hundred eleven million, twenty-one thousand, one hundred thirty-three".