1132221121 has 2 divisors, whose sum is σ = 1132221122. Its totient is φ = 1132221120.

The previous prime is 1132221119. The next prime is 1132221149. The reversal of 1132221121 is 1211222311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933974721 + 198246400 = 30561^2 + 14080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132221121 - 2¹ = 1132221119 is a prime.

Together with 1132221119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1132221095 and 1132221104.

It is not a weakly prime, because it can be changed into another prime (1132221221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566110560 + 566110561.

It is an arithmetic number, because the mean of its divisors is an integer number (566110561).

Almost surely, 2^1132221121 is an apocalyptic number.

It is an amenable number.

1132221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1132221121 is an equidigital number, since it uses as much as digits as its factorization.

1132221121 is an evil number, because the sum of its binary digits is even.

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

The square root of 1132221121 is about 33648.4935918386. The cubic root of 1132221121 is about 1042.2624320118.

Adding to 1132221121 its reverse (1211222311), we get a palindrome (2343443432).

The spelling of 1132221121 in words is "one billion, one hundred thirty-two million, two hundred twenty-one thousand, one hundred twenty-one".