221445112422443 has 8 divisors (see below), whose sum is σ = 272547830673888. Its totient is φ = 175209319718784.

The previous prime is 221445112422431. The next prime is 221445112422463. The reversal of 221445112422443 is 344224211544122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221445112422443 - 2⁴ = 221445112422427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221445112422443.

It is not an unprimeable number, because it can be changed into a prime (221445112422463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216731386846 + ... + 1216731387027.

It is an arithmetic number, because the mean of its divisors is an integer number (34068478834236).

Almost surely, 2^{221445112422443} is an apocalyptic number.

221445112422443 is a deficient number, since it is larger than the sum of its proper divisors (51102718251445).

221445112422443 is a wasteful number, since it uses less digits than its factorization.

221445112422443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433462773893.

The product of its digits is 491520, while the sum is 41.

Adding to 221445112422443 its reverse (344224211544122), we get a palindrome (565669323966565).

The spelling of 221445112422443 in words is "two hundred twenty-one trillion, four hundred forty-five billion, one hundred twelve million, four hundred twenty-two thousand, four hundred forty-three".