43242401221961 has 2 divisors, whose sum is σ = 43242401221962. Its totient is φ = 43242401221960.

The previous prime is 43242401221927. The next prime is 43242401222063. The reversal of 43242401221961 is 16912210424234.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37939255465225 + 5303145756736 = 6159485^2 + 2302856^2 .

It is a cyclic number.

It is not a de Polignac number, because 43242401221961 - 2⁶ = 43242401221897 is a prime.

It is not a weakly prime, because it can be changed into another prime (43242401220961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621200610980 + 21621200610981.

It is an arithmetic number, because the mean of its divisors is an integer number (21621200610981).

Almost surely, 2^{43242401221961} is an apocalyptic number.

It is an amenable number.

43242401221961 is a deficient number, since it is larger than the sum of its proper divisors (1).

43242401221961 is an equidigital number, since it uses as much as digits as its factorization.

43242401221961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 43242401221961 in words is "forty-three trillion, two hundred forty-two billion, four hundred one million, two hundred twenty-one thousand, nine hundred sixty-one".