43061632121 has 2 divisors, whose sum is σ = 43061632122. Its totient is φ = 43061632120.

The previous prime is 43061632099. The next prime is 43061632123. The reversal of 43061632121 is 12123616034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42368047225 + 693584896 = 205835^2 + 26336^2 .

It is a cyclic number.

It is not a de Polignac number, because 43061632121 - 2¹⁸ = 43061369977 is a prime.

It is a Sophie Germain prime.

Together with 43061632123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43061632123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21530816060 + 21530816061.

It is an arithmetic number, because the mean of its divisors is an integer number (21530816061).

Almost surely, 2^43061632121 is an apocalyptic number.

It is an amenable number.

43061632121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43061632121 is an equidigital number, since it uses as much as digits as its factorization.

43061632121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 43061632121 in words is "forty-three billion, sixty-one million, six hundred thirty-two thousand, one hundred twenty-one".