1133123221 has 16 divisors (see below), whose sum is σ = 1199761920. Its totient is φ = 1068004080.

The previous prime is 1133123203. The next prime is 1133123231. The reversal of 1133123221 is 1223213311.

It is not a de Polignac number, because 1133123221 - 2¹⁹ = 1132598933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133123231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1318690 + ... + 1319548.

It is an arithmetic number, because the mean of its divisors is an integer number (74985120).

Almost surely, 2^1133123221 is an apocalyptic number.

It is an amenable number.

1133123221 is a deficient number, since it is larger than the sum of its proper divisors (66638699).

1133123221 is an equidigital number, since it uses as much as digits as its factorization.

1133123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 216, while the sum is 19.

The square root of 1133123221 is about 33661.8956833985. The cubic root of 1133123221 is about 1042.5391669252.

Adding to 1133123221 its reverse (1223213311), we get a palindrome (2356336532).

The spelling of 1133123221 in words is "one billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred twenty-one".