43021222109 has 2 divisors, whose sum is σ = 43021222110. Its totient is φ = 43021222108.

The previous prime is 43021222061. The next prime is 43021222133. The reversal of 43021222109 is 90122212034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42745562500 + 275659609 = 206750^2 + 16603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43021222109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43021222009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510611054 + 21510611055.

It is an arithmetic number, because the mean of its divisors is an integer number (21510611055).

Almost surely, 2^43021222109 is an apocalyptic number.

It is an amenable number.

43021222109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43021222109 is an equidigital number, since it uses as much as digits as its factorization.

43021222109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 43021222109 in words is "forty-three billion, twenty-one million, two hundred twenty-two thousand, one hundred nine".