221222603405 has 16 divisors (see below), whose sum is σ = 270512296704. Its totient is φ = 173615532480.

The previous prime is 221222603383. The next prime is 221222603411. The reversal of 221222603405 is 504306222122.

It is not a de Polignac number, because 221222603405 - 2⁸ = 221222603149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2070812 + ... + 2175018.

It is an arithmetic number, because the mean of its divisors is an integer number (16907018544).

Almost surely, 2^221222603405 is an apocalyptic number.

It is an amenable number.

221222603405 is a deficient number, since it is larger than the sum of its proper divisors (49289693299).

221222603405 is a wasteful number, since it uses less digits than its factorization.

221222603405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112276.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 221222603405 its reverse (504306222122), we get a palindrome (725528825527).

The spelling of 221222603405 in words is "two hundred twenty-one billion, two hundred twenty-two million, six hundred three thousand, four hundred five".