43021130221 has 8 divisors (see below), whose sum is σ = 44507244600. Its totient is φ = 41535191040.

The previous prime is 43021130203. The next prime is 43021130233. The reversal of 43021130221 is 12203112034.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16062774121 + 26958356100 = 126739^2 + 164190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43021130221 - 2⁹ = 43021129709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43021130281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633565 + ... + 698173.

It is an arithmetic number, because the mean of its divisors is an integer number (5563405575).

Almost surely, 2^43021130221 is an apocalyptic number.

It is an amenable number.

43021130221 is a deficient number, since it is larger than the sum of its proper divisors (1486114379).

43021130221 is a wasteful number, since it uses less digits than its factorization.

43021130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87599.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 43021130221 its reverse (12203112034), we get a palindrome (55224242255).

The spelling of 43021130221 in words is "forty-three billion, twenty-one million, one hundred thirty thousand, two hundred twenty-one".