221443420024210 has 16 divisors (see below), whose sum is σ = 398598510646296. Its totient is φ = 88577289209088.

The previous prime is 221443420024193. The next prime is 221443420024219. The reversal of 221443420024210 is 12420024344122.

It can be written as a sum of positive squares in 4 ways, for example, as 158215970462449 + 63227449561761 = 12578393^2 + 7951569^2 .

It is a super-2 number, since 2×221443420024210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221443420024219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2716042 + ... + 21219418.

Almost surely, 2^{221443420024210} is an apocalyptic number.

221443420024210 is a deficient number, since it is larger than the sum of its proper divisors (177155090622086).

221443420024210 is a wasteful number, since it uses less digits than its factorization.

221443420024210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19700157.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 221443420024210 its reverse (12420024344122), we get a palindrome (233863444368332).

The spelling of 221443420024210 in words is "two hundred twenty-one trillion, four hundred forty-three billion, four hundred twenty million, twenty-four thousand, two hundred ten".