221421466822 has 32 divisors (see below), whose sum is σ = 363185282304. Its totient is φ = 100789401600.

The previous prime is 221421466817. The next prime is 221421466823. The reversal of 221421466822 is 228664124122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421466823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2229088 + ... + 2326300.

It is an arithmetic number, because the mean of its divisors is an integer number (11349540072).

Almost surely, 2^221421466822 is an apocalyptic number.

221421466822 is a deficient number, since it is larger than the sum of its proper divisors (141763815482).

221421466822 is a wasteful number, since it uses less digits than its factorization.

221421466822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99424.

The product of its digits is 147456, while the sum is 40.

The spelling of 221421466822 in words is "two hundred twenty-one billion, four hundred twenty-one million, four hundred sixty-six thousand, eight hundred twenty-two".