221430421244 has 12 divisors (see below), whose sum is σ = 387527163744. Its totient is φ = 110708374464.

The previous prime is 221430421211. The next prime is 221430421271. The reversal of 221430421244 is 442124034122.

It is a happy number.

221430421244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1635812 + ... + 1765995.

It is an arithmetic number, because the mean of its divisors is an integer number (32293930312).

Almost surely, 2^221430421244 is an apocalyptic number.

It is an amenable number.

221430421244 is a deficient number, since it is larger than the sum of its proper divisors (166096742500).

221430421244 is a wasteful number, since it uses less digits than its factorization.

221430421244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418084 (or 3418082 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 221430421244 its reverse (442124034122), we get a palindrome (663554455366).

The spelling of 221430421244 in words is "two hundred twenty-one billion, four hundred thirty million, four hundred twenty-one thousand, two hundred forty-four".