221212243144424 has 96 divisors (see below), whose sum is σ = 488683050609600. Its totient is φ = 93590334109440.

The previous prime is 221212243144423. The next prime is 221212243144427. The reversal of 221212243144424 is 424441342212122.

221212243144424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221212243144423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39301589 + ... + 44576219.

It is an arithmetic number, because the mean of its divisors is an integer number (5090448443850).

Almost surely, 2^{221212243144424} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221212243144424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244341525304800).

221212243144424 is an abundant number, since it is smaller than the sum of its proper divisors (267470807465176).

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

221212243144424 is a wasteful number, since it uses less digits than its factorization.

221212243144424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276023 (or 5276012 counting only the distinct ones).

The product of its digits is 196608, while the sum is 38.

Adding to 221212243144424 its reverse (424441342212122), we get a palindrome (645653585356546).

The spelling of 221212243144424 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred forty-three million, one hundred forty-four thousand, four hundred twenty-four".