65412121 has 2 divisors, whose sum is σ = 65412122. Its totient is φ = 65412120.

The previous prime is 65412119. The next prime is 65412163. The reversal of 65412121 is 12121456.

65412121 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., 63043600 + 2368521 = 7940^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 65412121 - 2¹ = 65412119 is a prime.

Together with 65412119, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 65412092 and 65412101.

It is not a weakly prime, because it can be changed into another prime (65412521) 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, 32706060 + 32706061.

It is an arithmetic number, because the mean of its divisors is an integer number (32706061).

Almost surely, 2^65412121 is an apocalyptic number.

It is an amenable number.

65412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

65412121 is an equidigital number, since it uses as much as digits as its factorization.

65412121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 65412121 is about 8087.7760231104. The cubic root of 65412121 is about 402.9205429247.

Adding to 65412121 its reverse (12121456), we get a palindrome (77533577).

The spelling of 65412121 in words is "sixty-five million, four hundred twelve thousand, one hundred twenty-one".