1133121211 has 4 divisors (see below), whose sum is σ = 1145853000. Its totient is φ = 1120389424.

The previous prime is 1133121191. The next prime is 1133121217. The reversal of 1133121211 is 1121213311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1133121211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133121217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6365761 + ... + 6365938.

It is an arithmetic number, because the mean of its divisors is an integer number (286463250).

Almost surely, 2^1133121211 is an apocalyptic number.

1133121211 is a deficient number, since it is larger than the sum of its proper divisors (12731789).

1133121211 is an equidigital number, since it uses as much as digits as its factorization.

1133121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12731788.

The product of its digits is 36, while the sum is 16.

The square root of 1133121211 is about 33661.8658276691. The cubic root of 1133121211 is about 1042.5385504859.

Adding to 1133121211 its reverse (1121213311), we get a palindrome (2254334522).

The spelling of 1133121211 in words is "one billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred eleven".