65632104121 has 2 divisors, whose sum is σ = 65632104122. Its totient is φ = 65632104120.

The previous prime is 65632104103. The next prime is 65632104127. The reversal of 65632104121 is 12140123656.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60979363600 + 4652740521 = 246940^2 + 68211^2 .

It is a cyclic number.

It is not a de Polignac number, because 65632104121 - 2¹³ = 65632095929 is a prime.

It is not a weakly prime, because it can be changed into another prime (65632104127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32816052060 + 32816052061.

It is an arithmetic number, because the mean of its divisors is an integer number (32816052061).

Almost surely, 2^65632104121 is an apocalyptic number.

It is an amenable number.

65632104121 is a deficient number, since it is larger than the sum of its proper divisors (1).

65632104121 is an equidigital number, since it uses as much as digits as its factorization.

65632104121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 65632104121 its reverse (12140123656), we get a palindrome (77772227777).

The spelling of 65632104121 in words is "sixty-five billion, six hundred thirty-two million, one hundred four thousand, one hundred twenty-one".