221443041420 has 72 divisors (see below), whose sum is σ = 711222954624. Its totient is φ = 55577860608.

The previous prime is 221443041401. The next prime is 221443041493. The reversal of 221443041420 is 24140344122.

221443041420 is a `hidden beast` number, since 2 + 214 + 4 + 30 + 414 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36180444 + ... + 36186563.

It is an arithmetic number, because the mean of its divisors is an integer number (9878096592).

Almost surely, 2^221443041420 is an apocalyptic number.

221443041420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221443041420 is an abundant number, since it is smaller than the sum of its proper divisors (489779913204).

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

221443041420 is a wasteful number, since it uses less digits than its factorization.

221443041420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72367039 (or 72367034 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221443041420 its reverse (24140344122), we get a palindrome (245583385542).

The spelling of 221443041420 in words is "two hundred twenty-one billion, four hundred forty-three million, forty-one thousand, four hundred twenty".