221423430012 has 48 divisors (see below), whose sum is σ = 529073395200. Its totient is φ = 72054702720.

The previous prime is 221423429977. The next prime is 221423430029. The reversal of 221423430012 is 210034324122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 1227814 + ... + 1396557.

It is an arithmetic number, because the mean of its divisors is an integer number (11022362400).

Almost surely, 2^221423430012 is an apocalyptic number.

It is an amenable number.

221423430012 is an abundant number, since it is smaller than the sum of its proper divisors (307649965188).

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

221423430012 is a wasteful number, since it uses less digits than its factorization.

221423430012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624546 (or 2624544 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221423430012 its reverse (210034324122), we get a palindrome (431457754134).

The spelling of 221423430012 in words is "two hundred twenty-one billion, four hundred twenty-three million, four hundred thirty thousand, twelve".