221341421440 has 32 divisors (see below), whose sum is σ = 529144337160. Its totient is φ = 88536568320.

The previous prime is 221341421429. The next prime is 221341421467. The reversal of 221341421440 is 44124143122.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 221341421399 and 221341421408.

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 3 ways as a sum of consecutive naturals, for example, 172922346 + ... + 172923625.

Almost surely, 2^221341421440 is an apocalyptic number.

221341421440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221341421440 is an abundant number, since it is smaller than the sum of its proper divisors (307802915720).

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

221341421440 is an equidigital number, since it uses as much as digits as its factorization.

221341421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345845990 (or 345845978 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 221341421440 its reverse (44124143122), we get a palindrome (265465564562).

The spelling of 221341421440 in words is "two hundred twenty-one billion, three hundred forty-one million, four hundred twenty-one thousand, four hundred forty".