64111321 has 2 divisors, whose sum is σ = 64111322. Its totient is φ = 64111320.

The previous prime is 64111253. The next prime is 64111349. The reversal of 64111321 is 12311146.

64111321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 7485696 = 7525^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 64111321 - 2¹¹ = 64109273 is a prime.

It is a super-2 number, since 2×64111321² = 8220522960730082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64111391) 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, 32055660 + 32055661.

It is an arithmetic number, because the mean of its divisors is an integer number (32055661).

Almost surely, 2^64111321 is an apocalyptic number.

It is an amenable number.

64111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64111321 is an equidigital number, since it uses as much as digits as its factorization.

64111321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 64111321 is about 8006.9545396486. The cubic root of 64111321 is about 400.2317844140.

Adding to 64111321 its reverse (12311146), we get a palindrome (76422467).

The spelling of 64111321 in words is "sixty-four million, one hundred eleven thousand, three hundred twenty-one".