1109216321 has 2 divisors, whose sum is σ = 1109216322. Its totient is φ = 1109216320.

The previous prime is 1109216293. The next prime is 1109216341. The reversal of 1109216321 is 1236129011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1035874225 + 73342096 = 32185^2 + 8564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109216321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1109216341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554608160 + 554608161.

It is an arithmetic number, because the mean of its divisors is an integer number (554608161).

Almost surely, 2^1109216321 is an apocalyptic number.

It is an amenable number.

1109216321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109216321 is an equidigital number, since it uses as much as digits as its factorization.

1109216321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1109216321 is about 33304.8993542992. The cubic root of 1109216321 is about 1035.1550783210.

The spelling of 1109216321 in words is "one billion, one hundred nine million, two hundred sixteen thousand, three hundred twenty-one".