64112021 has 2 divisors, whose sum is σ = 64112022. Its totient is φ = 64112020.

The previous prime is 64112003. The next prime is 64112071. The reversal of 64112021 is 12021146.

64112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 13060996 = 7145^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 64112021 - 2²² = 59917717 is a prime.

It is a super-2 number, since 2×64112021² = 8220702473408882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64112071) 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, 32056010 + 32056011.

It is an arithmetic number, because the mean of its divisors is an integer number (32056011).

Almost surely, 2^64112021 is an apocalyptic number.

It is an amenable number.

64112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

64112021 is an equidigital number, since it uses as much as digits as its factorization.

64112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 64112021 is about 8006.9982515297. The cubic root of 64112021 is about 400.2332410534.

Adding to 64112021 its reverse (12021146), we get a palindrome (76133167).

The spelling of 64112021 in words is "sixty-four million, one hundred twelve thousand, twenty-one".