221233304423 has 4 divisors (see below), whose sum is σ = 225407517768. Its totient is φ = 217059091080.

The previous prime is 221233304419. The next prime is 221233304459. The reversal of 221233304423 is 324403332122.

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 221233304423 - 2² = 221233304419 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 (221233304023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087106593 + ... + 2087106698.

It is an arithmetic number, because the mean of its divisors is an integer number (56351879442).

Almost surely, 2^221233304423 is an apocalyptic number.

221233304423 is a deficient number, since it is larger than the sum of its proper divisors (4174213345).

221233304423 is an equidigital number, since it uses as much as digits as its factorization.

221233304423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174213344.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 221233304423 its reverse (324403332122), we get a palindrome (545636636545).

The spelling of 221233304423 in words is "two hundred twenty-one billion, two hundred thirty-three million, three hundred four thousand, four hundred twenty-three".