1132112221 has 4 divisors (see below), whose sum is σ = 1132181532. Its totient is φ = 1132042912.

The previous prime is 1132112183. The next prime is 1132112239. The reversal of 1132112221 is 1222112311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 216384100 + 915728121 = 14710^2 + 30261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132112221 - 2⁹ = 1132111709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1132112195 and 1132112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1132112291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4881 + ... + 47833.

It is an arithmetic number, because the mean of its divisors is an integer number (283045383).

Almost surely, 2^1132112221 is an apocalyptic number.

It is an amenable number.

1132112221 is a deficient number, since it is larger than the sum of its proper divisors (69311).

1132112221 is an equidigital number, since it uses as much as digits as its factorization.

1132112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69310.

The product of its digits is 48, while the sum is 16.

The square root of 1132112221 is about 33646.8753526981. The cubic root of 1132112221 is about 1042.2290150947.

Adding to 1132112221 its reverse (1222112311), we get a palindrome (2354224532).

The spelling of 1132112221 in words is "one billion, one hundred thirty-two million, one hundred twelve thousand, two hundred twenty-one".