221454224420 has 96 divisors (see below), whose sum is σ = 570111816960. Its totient is φ = 71102338560.

The previous prime is 221454224419. The next prime is 221454224471. The reversal of 221454224420 is 24422454122.

221454224420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1617515 + ... + 1749074.

It is an arithmetic number, because the mean of its divisors is an integer number (5938664760).

Almost surely, 2^221454224420 is an apocalyptic number.

221454224420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221454224420 is an abundant number, since it is smaller than the sum of its proper divisors (348657592540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221454224420 is a wasteful number, since it uses less digits than its factorization.

221454224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366645 (or 3366643 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 221454224420 its reverse (24422454122), we get a palindrome (245876678542).

The spelling of 221454224420 in words is "two hundred twenty-one billion, four hundred fifty-four million, two hundred twenty-four thousand, four hundred twenty".