43221244212217 has 2 divisors, whose sum is σ = 43221244212218. Its totient is φ = 43221244212216.

The previous prime is 43221244212169. The next prime is 43221244212281. The reversal of 43221244212217 is 71221244212234.

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., 39183330796281 + 4037913415936 = 6259659^2 + 2009456^2 .

It is a cyclic number.

It is not a de Polignac number, because 43221244212217 - 2⁴³ = 34425151190009 is a prime.

It is not a weakly prime, because it can be changed into another prime (43221244215217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610622106108 + 21610622106109.

It is an arithmetic number, because the mean of its divisors is an integer number (21610622106109).

Almost surely, 2^{43221244212217} is an apocalyptic number.

It is an amenable number.

43221244212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221244212217 is an equidigital number, since it uses as much as digits as its factorization.

43221244212217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 37.

The spelling of 43221244212217 in words is "forty-three trillion, two hundred twenty-one billion, two hundred forty-four million, two hundred twelve thousand, two hundred seventeen".