43321120443221 has 4 divisors (see below), whose sum is σ = 43538814516000. Its totient is φ = 43103426370444.

The previous prime is 43321120443203. The next prime is 43321120443247. The reversal of 43321120443221 is 12234402112334.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43321120443221 - 2⁶ = 43321120443157 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 (43321120446221) 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, 108847036091 + ... + 108847036488.

It is an arithmetic number, because the mean of its divisors is an integer number (10884703629000).

Almost surely, 2^{43321120443221} is an apocalyptic number.

It is an amenable number.

43321120443221 is a deficient number, since it is larger than the sum of its proper divisors (217694072779).

43321120443221 is a wasteful number, since it uses less digits than its factorization.

43321120443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217694072778.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 43321120443221 its reverse (12234402112334), we get a palindrome (55555522555555).

The spelling of 43321120443221 in words is "forty-three trillion, three hundred twenty-one billion, one hundred twenty million, four hundred forty-three thousand, two hundred twenty-one".