221423421340043 has 4 divisors (see below), whose sum is σ = 238455992212368. Its totient is φ = 204390850467720.

The previous prime is 221423421340027. The next prime is 221423421340061. The reversal of 221423421340043 is 340043124324122.

It is a happy number.

221423421340043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221423421340043 - 2⁴ = 221423421340027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221423421339985 and 221423421340012.

It is not an unprimeable number, because it can be changed into a prime (221423421348043) 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, 8516285436143 + ... + 8516285436168.

It is an arithmetic number, because the mean of its divisors is an integer number (59613998053092).

Almost surely, 2^{221423421340043} is an apocalyptic number.

221423421340043 is a deficient number, since it is larger than the sum of its proper divisors (17032570872325).

221423421340043 is a wasteful number, since it uses less digits than its factorization.

221423421340043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032570872324.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 221423421340043 its reverse (340043124324122), we get a palindrome (561466545664165).

The spelling of 221423421340043 in words is "two hundred twenty-one trillion, four hundred twenty-three billion, four hundred twenty-one million, three hundred forty thousand, forty-three".