43354224221221 has 4 divisors (see below), whose sum is σ = 43410601626700. Its totient is φ = 43297846815744.

The previous prime is 43354224221207. The next prime is 43354224221239. The reversal of 43354224221221 is 12212242245334.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11837115941121 + 31517108280100 = 3440511^2 + 5614010^2 .

It is a cyclic number.

It is not a de Polignac number, because 43354224221221 - 2⁹ = 43354224220709 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 (43354224221291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28188701586 + ... + 28188703123.

It is an arithmetic number, because the mean of its divisors is an integer number (10852650406675).

Almost surely, 2^{43354224221221} is an apocalyptic number.

It is an amenable number.

43354224221221 is a deficient number, since it is larger than the sum of its proper divisors (56377405479).

43354224221221 is an equidigital number, since it uses as much as digits as its factorization.

43354224221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56377405478.

The product of its digits is 184320, while the sum is 37.

Adding to 43354224221221 its reverse (12212242245334), we get a palindrome (55566466466555).

The spelling of 43354224221221 in words is "forty-three trillion, three hundred fifty-four billion, two hundred twenty-four million, two hundred twenty-one thousand, two hundred twenty-one".