1116432221 has 2 divisors, whose sum is σ = 1116432222. Its totient is φ = 1116432220.

The previous prime is 1116432199. The next prime is 1116432223. The reversal of 1116432221 is 1222346111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969076900 + 147355321 = 31130^2 + 12139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116432221 - 2²⁶ = 1049323357 is a prime.

It is a super-3 number, since 3×1116432221³ (a number of 28 digits) contains 333 as substring.

Together with 1116432223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116432223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558216110 + 558216111.

It is an arithmetic number, because the mean of its divisors is an integer number (558216111).

Almost surely, 2^1116432221 is an apocalyptic number.

It is an amenable number.

1116432221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116432221 is an equidigital number, since it uses as much as digits as its factorization.

1116432221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 1116432221 is about 33413.0546493433. The cubic root of 1116432221 is about 1037.3949288475.

Adding to 1116432221 its reverse (1222346111), we get a palindrome (2338778332).

The spelling of 1116432221 in words is "one billion, one hundred sixteen million, four hundred thirty-two thousand, two hundred twenty-one".