221200304424 has 64 divisors (see below), whose sum is σ = 609246636480. Its totient is φ = 66366720000.

The previous prime is 221200304401. The next prime is 221200304473. The reversal of 221200304424 is 424403002122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 221200304394 and 221200304403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4121257 + ... + 4174584.

It is an arithmetic number, because the mean of its divisors is an integer number (9519478695).

Almost surely, 2^221200304424 is an apocalyptic number.

221200304424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221200304424 is an abundant number, since it is smaller than the sum of its proper divisors (388046332056).

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

221200304424 is a wasteful number, since it uses less digits than its factorization.

221200304424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295962 (or 8295958 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221200304424 its reverse (424403002122), we get a palindrome (645603306546).

The spelling of 221200304424 in words is "two hundred twenty-one billion, two hundred million, three hundred four thousand, four hundred twenty-four".