1118057321 has 2 divisors, whose sum is σ = 1118057322. Its totient is φ = 1118057320.

The previous prime is 1118057293. The next prime is 1118057323. The reversal of 1118057321 is 1237508111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996286096 + 121771225 = 31564^2 + 11035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118057321 - 2¹⁰ = 1118056297 is a prime.

Together with 1118057323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1118057323) 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 as a sum of consecutive naturals, namely, 559028660 + 559028661.

It is an arithmetic number, because the mean of its divisors is an integer number (559028661).

Almost surely, 2^1118057321 is an apocalyptic number.

It is an amenable number.

1118057321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118057321 is an equidigital number, since it uses as much as digits as its factorization.

1118057321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 1118057321 is about 33437.3641455184. The cubic root of 1118057321 is about 1037.8980354201.

The spelling of 1118057321 in words is "one billion, one hundred eighteen million, fifty-seven thousand, three hundred twenty-one".