221221200043 has 4 divisors (see below), whose sum is σ = 221287298760. Its totient is φ = 221155101328.

The previous prime is 221221200037. The next prime is 221221200089. The reversal of 221221200043 is 340002122122.

221221200043 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 a de Polignac number, because none of the positive numbers 2^k-221221200043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221200643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33044338 + ... + 33051031.

It is an arithmetic number, because the mean of its divisors is an integer number (55321824690).

Almost surely, 2^221221200043 is an apocalyptic number.

221221200043 is a deficient number, since it is larger than the sum of its proper divisors (66098717).

221221200043 is an equidigital number, since it uses as much as digits as its factorization.

221221200043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66098716.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221221200043 its reverse (340002122122), we get a palindrome (561223322165).

The spelling of 221221200043 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, forty-three".